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A sign is an
object Object may refer to: General meanings * Object (philosophy), a thing, being, or concept ** Object (abstract), an object which does not exist at any particular time or place ** Physical object, an identifiable collection of matter * Goal, an ai ...
,
quality Quality may refer to: Concepts *Quality (business), the ''non-inferiority'' or ''superiority'' of something *Quality (philosophy), an attribute or a property *Quality (physics), in response theory *Energy quality, used in various science discipli ...
, event, or
entity An entity is something that exists as itself, as a subject or as an object, actually or potentially, concretely or abstractly, physically or not. It need not be of material existence. In particular, abstractions and legal fictions are usually ...
whose presence or occurrence indicates the probable presence or occurrence of something else. A natural sign bears a causal relation to its object—for instance,
thunder Thunder is the sound caused by lightning. Depending upon the distance from and nature of the lightning, it can range from a long, low rumble to a sudden, loud crack. The sudden increase in temperature and hence pressure caused by the lightning pr ...
is a sign of storm, or medical
symptom Signs and symptoms are the observed or detectable signs, and experienced symptoms of an illness, injury, or condition. A sign for example may be a higher or lower temperature than normal, raised or lowered blood pressure or an abnormality showin ...
s a sign of disease. A conventional sign signifies by agreement, as a
full stop The full stop (Commonwealth English), period (North American English), or full point , is a punctuation mark. It is used for several purposes, most often to mark the end of a declarative sentence (as distinguished from a question or exclamation ...
signifies the end of a sentence; similarly the words and expressions of a
language Language is a structured system of communication. The structure of a language is its grammar and the free components are its vocabulary. Languages are the primary means by which humans communicate, and may be conveyed through a variety of met ...
, as well as bodily
gesture A gesture is a form of non-verbal communication or non-vocal communication in which visible bodily actions communicate particular messages, either in place of, or in conjunction with, speech. Gestures include movement of the hands, face, or ot ...
s, can be regarded as signs, expressing particular meanings. The
physical objects In common usage and classical mechanics, a physical object or physical body (or simply an object or body) is a collection of matter within a defined contiguous boundary in three-dimensional space. The boundary must be defined and identified by t ...
most commonly referred to as signs (notices,
road sign Traffic signs or road signs are signs erected at the side of or above roads to give instructions or provide information to road users. The earliest signs were simple wooden or stone milestones. Later, signs with directional arms were introduce ...
s, etc., collectively known as
signage Signage is the design or use of signs and symbols to communicate a message. A signage also means signs ''collectively'' or being considered as a group. The term ''signage'' is documented to have been popularized in 1975 to 1980. Signs are any ...
) generally inform or instruct using
written text Writing is a medium of human communication which involves the representation of a language through a system of physically inscribed, mechanically transferred, or digitally represented symbols. Writing systems do not themselves constitute h ...
,
symbol A symbol is a mark, sign, or word that indicates, signifies, or is understood as representing an idea, object, or relationship. Symbols allow people to go beyond what is known or seen by creating linkages between otherwise very different conc ...
s,
picture An image is a visual representation of something. It can be two-dimensional, three-dimensional, or somehow otherwise feed into the visual system to convey information. An image can be an artifact, such as a photograph or other two-dimensiona ...
s or a combination of these. The
philosophical Philosophy (from , ) is the systematized study of general and fundamental questions, such as those about existence, reason, knowledge, values, mind, and language. Such questions are often posed as problems to be studied or resolved. Some ...
study of signs and
symbol A symbol is a mark, sign, or word that indicates, signifies, or is understood as representing an idea, object, or relationship. Symbols allow people to go beyond what is known or seen by creating linkages between otherwise very different conc ...
s is called
semiotics Semiotics (also called semiotic studies) is the systematic study of sign processes ( semiosis) and meaning making. Semiosis is any activity, conduct, or process that involves signs, where a sign is defined as anything that communicates something ...
; this includes the study of
semiosis Semiosis (, ), or sign process, is any form of activity, conduct, or process that involves signs, including the production of meaning. A sign is anything that communicates a meaning, that is not the sign itself, to the interpreter of the sign ...
, which is the way in which signs (in the semiotic sense) operate.


Nature

Semiotics Semiotics (also called semiotic studies) is the systematic study of sign processes ( semiosis) and meaning making. Semiosis is any activity, conduct, or process that involves signs, where a sign is defined as anything that communicates something ...
,
epistemology Epistemology (; ), or the theory of knowledge, is the branch of philosophy concerned with knowledge. Epistemology is considered a major subfield of philosophy, along with other major subfields such as ethics, logic, and metaphysics. Episte ...
, logic, and
philosophy of language In analytic philosophy, philosophy of language investigates the nature of language and the relations between language, language users, and the world. Investigations may include inquiry into the nature of meaning, intentionality, reference, ...
are concerned about the nature of signs, what they are and how they signify. The nature of signs and symbols and significations, their definition, elements, and types, is mainly established by
Aristotle Aristotle (; grc-gre, Ἀριστοτέλης ''Aristotélēs'', ; 384–322 BC) was a Greek philosopher and polymath during the Classical period in Ancient Greece. Taught by Plato, he was the founder of the Peripatetic school of phil ...
,
Augustine Augustine of Hippo ( , ; la, Aurelius Augustinus Hipponensis; 13 November 354 – 28 August 430), also known as Saint Augustine, was a theologian and philosopher of Berbers, Berber origin and the bishop of Hippo Regius in Numidia (Roman pr ...
, and
Aquinas Thomas Aquinas, OP (; it, Tommaso d'Aquino, lit=Thomas of Aquino; 1225 – 7 March 1274) was an Italian Dominican friar and priest who was an influential philosopher, theologian and jurist in the tradition of scholasticism; he is known wit ...
. According to these classic sources, significance is a relationship between two sorts of things: signs and the kinds of things they signify (intend, express or mean), where one term necessarily causes something else to come to the mind. Distinguishing natural signs and conventional signs, the traditional theory of signs (
Augustine Augustine of Hippo ( , ; la, Aurelius Augustinus Hipponensis; 13 November 354 – 28 August 430), also known as Saint Augustine, was a theologian and philosopher of Berbers, Berber origin and the bishop of Hippo Regius in Numidia (Roman pr ...
) sets the following threefold partition of things: all sorts of indications, evidences, symptoms, and physical signals, there are signs which are ''always'' signs (the entities of the mind as ideas and images, thoughts and feelings, constructs and intentions); and there are signs that ''have'' to get their signification (as linguistic entities and cultural symbols). So, while natural signs serve as the source of signification, the human mind is the agency through which signs signify naturally occurring things, such as objects, states, qualities, quantities, events, processes, or relationships. Human
language Language is a structured system of communication. The structure of a language is its grammar and the free components are its vocabulary. Languages are the primary means by which humans communicate, and may be conveyed through a variety of met ...
and
discourse Discourse is a generalization of the notion of a conversation to any form of communication. Discourse is a major topic in social theory, with work spanning fields such as sociology, anthropology, continental philosophy, and discourse analysis. ...
,
communication Communication (from la, communicare, meaning "to share" or "to be in relation with") is usually defined as the transmission of information. The term may also refer to the message communicated through such transmissions or the field of inquir ...
,
philosophy Philosophy (from , ) is the systematized study of general and fundamental questions, such as those about existence, reason, knowledge, values, mind, and language. Such questions are often posed as problems to be studied or resolved. Some ...
,
science Science is a systematic endeavor that builds and organizes knowledge in the form of testable explanations and predictions about the universe. Science may be as old as the human species, and some of the earliest archeological evidence for ...
,
logic Logic is the study of correct reasoning. It includes both formal and informal logic. Formal logic is the science of deductively valid inferences or of logical truths. It is a formal science investigating how conclusions follow from premises ...
,
mathematics Mathematics is an area of knowledge that includes the topics of numbers, formulas and related structures, shapes and the spaces in which they are contained, and quantities and their changes. These topics are represented in modern mathematics ...
,
poetry Poetry (derived from the Greek ''poiesis'', "making"), also called verse, is a form of literature that uses aesthetic and often rhythmic qualities of language − such as phonaesthetics, sound symbolism, and metre − to evoke meanings i ...
,
theology Theology is the systematic study of the nature of the divine and, more broadly, of religious belief. It is taught as an academic discipline, typically in universities and seminaries. It occupies itself with the unique content of analyzing the ...
, and
religion Religion is usually defined as a social- cultural system of designated behaviors and practices, morals, beliefs, worldviews, texts, sanctified places, prophecies, ethics, or organizations, that generally relates humanity to supernatural, ...
are only some of fields of human study and activity where grasping the nature of signs and symbols and patterns of signification may have a decisive value. Communication takes place without words but via the mind as a result of signs and symbols; They communicate/pass across/ messages to the human mind through their pictorial representation.


Types

The word ''sign'' has a variety of meanings in English, including: *
Sun sign In astrology, planets have a meaning different from the astronomical understanding of what a planet is. Before the age of telescopes, the night sky was thought to consist of two very similar components: fixed stars, which remained motionless in ...
s in
astrology Astrology is a range of Divination, divinatory practices, recognized as pseudoscientific since the 18th century, that claim to discern information about human affairs and terrestrial events by studying the apparent positions of Celestial o ...
* Sign or signing, in communication: communicating via
hand gesture A hand is a prehensile, multi-fingered appendage located at the end of the forearm or forelimb of primates such as humans, chimpanzees, monkeys, and lemurs. A few other vertebrates such as the koala (which has two opposable thumbs on each "hand ...
s, such as in
sign language Sign languages (also known as signed languages) are languages that use the visual-manual modality to convey meaning, instead of spoken words. Sign languages are expressed through manual articulation in combination with non-manual markers. Sign l ...
. *
Gang signal A gang signal, also known as a gang sign, is a verbal or visual way gang members identify their affiliation. This can take many forms including slogans, hand signs, colored clothing and graffiti. The wearer usually favors, or is in, that part ...
* Sign, in
Tracking (hunting) Tracking in hunting and ecology is the science and art of observing animal tracks and other signs, with the goal of gaining understanding of the landscape and the animal being tracked (the "quarry"). A further goal of tracking is the deeper unde ...
: also known as
Spoor (animal) Spoor is a trace or a set of footprints by which the progress of someone or something may be followed. Spoor may include tracks, scents, or broken foliage. Spoor is useful for discovering or surveying what types of animals live in an area, or in ...
; trace evidence left on the ground after passage. * A
signboard Signage is the design or use of signs and symbols to communicate a message. A signage also means signs ''collectively'' or being considered as a group. The term ''signage'' is documented to have been popularized in 1975 to 1980. Signs are any ...
. * A sign, in common use, is an indication that a previously observed event is about to occur again * Sign, in
divination Divination (from Latin ''divinare'', 'to foresee, to foretell, to predict, to prophesy') is the attempt to gain insight into a question or situation by way of an occultic, standardized process or ritual. Used in various forms throughout histor ...
and religion: an
omen An omen (also called ''portent'') is a phenomenon that is believed to foretell the future, often signifying the advent of change. It was commonly believed in ancient times, and still believed by some today, that omens bring divine messages fr ...
, an event or occurrence believed to foretell the future * Sign, in
ontology In metaphysics, ontology is the philosophical study of being, as well as related concepts such as existence, becoming, and reality. Ontology addresses questions like how entities are grouped into categories and which of these entities exis ...
and
spirituality The meaning of ''spirituality'' has developed and expanded over time, and various meanings can be found alongside each other. Traditionally, spirituality referred to a religious process of re-formation which "aims to recover the original shape o ...
: a
coincidence A coincidence is a remarkable concurrence of events or circumstances that have no apparent causal connection with one another. The perception of remarkable coincidences may lead to supernatural, occult, or paranormal claims, or it may lead t ...
or surprising event thought to reveal divine will; see
synchronicity Synchronicity (german: Synchronizität) is a concept first introduced by analytical psychologist Carl G. Jung "to describe circumstances that appear meaningfully related yet lack a causal connection." In contemporary research, synchronicity ...
*
Sign (linguistics) In semiotics, a sign is anything that communicates a meaning that is not the sign itself to the interpreter of the sign. The meaning can be intentional, as when a word is uttered with a specific meaning, or unintentional, as when a symptom is t ...
: a combination of a concept and a sound-image described by Ferdinand de Saussure * In
mathematics Mathematics is an area of knowledge that includes the topics of numbers, formulas and related structures, shapes and the spaces in which they are contained, and quantities and their changes. These topics are represented in modern mathematics ...
, the sign of a number tells whether it is positive or negative. Also, the
sign of a permutation In mathematics, when ''X'' is a finite set with at least two elements, the permutations of ''X'' (i.e. the bijective functions from ''X'' to ''X'') fall into two classes of equal size: the even permutations and the odd permutations. If any total ...
tells whether it is the product of an even or odd number of transpositions. *
Signedness In computing, signedness is a property of data types representing numbers in computer programs. A numeric variable is ''signed'' if it can represent both positive and negative numbers, and ''unsigned'' if it can only represent non-negative numbers ...
, in computing, is the property that a representation of a number has one
bit The bit is the most basic unit of information in computing and digital communications. The name is a portmanteau of binary digit. The bit represents a logical state with one of two possible values. These values are most commonly represente ...
, the sign bit, which denotes whether the number is non-negative or negative. A number is called signed if it contains a sign bit, otherwise unsigned. See also
signed number representation In computing, signed number representations are required to encode negative numbers in binary number systems. In mathematics, negative numbers in any base are represented by prefixing them with a minus sign ("−"). However, in RAM or CPU regist ...
* Sign, in
biology Biology is the scientific study of life. It is a natural science with a broad scope but has several unifying themes that tie it together as a single, coherent field. For instance, all organisms are made up of cells that process hereditary i ...
: an indication of some living thing's presence *
Medical sign Signs and symptoms are the observed or detectable signs, and experienced symptoms of an illness, injury, or condition. A sign for example may be a higher or lower temperature than normal, raised or lowered blood pressure or an abnormality showin ...
, in
medicine Medicine is the science and practice of caring for a patient, managing the diagnosis, prognosis, prevention, treatment, palliation of their injury or disease, and promoting their health. Medicine encompasses a variety of health care pract ...
: objective evidence of the presence of a disease or disorder, as opposed to a
symptom Signs and symptoms are the observed or detectable signs, and experienced symptoms of an illness, injury, or condition. A sign for example may be a higher or lower temperature than normal, raised or lowered blood pressure or an abnormality showin ...
, which is subjective *
Sign (semiotics) In semiotics, a sign is anything that communicates a meaning that is not the sign itself to the interpreter of the sign. The meaning can be intentional, as when a word is uttered with a specific meaning, or unintentional, as when a symptom is t ...
: the basic unit of meaning *
Information sign An Information sign is an indicator of a source of information, or may itself be informatory. Typical information signs include information boards, traffic signs, pointers to a help desk (such as in a public library, a railway station or an airpo ...
: a notice that instructs, advises, informs or warns
people A person (plural, : people) is a being that has certain capacities or attributes such as reason, morality, consciousness or self-consciousness, and being a part of a culturally established form of social relations such as kinship, ownership of pr ...
*
Traffic sign Traffic signs or road signs are signs erected at the side of or above roads to give instructions or provide information to road users. The earliest signs were simple wooden or stone milestones. Later, signs with directional arms were introduce ...
: a sign that instructs drivers; see also
stop sign A stop sign is a traffic sign designed to notify drivers that they must come to a complete stop and make sure the intersection is safely clear of vehicles and pedestrians before continuing past the sign. In many countries, the sign is a red oc ...
,
speed limit Speed limits on road traffic, as used in most countries, set the legal maximum speed at which vehicles may travel on a given stretch of road. Speed limits are generally indicated on a traffic sign reflecting the maximum permitted speed - expres ...
sign,
cross walk A pedestrian crossing (or crosswalk in American English) is a place designated for pedestrians to cross a road, street or avenue. The term "pedestrian crossing" is also used in the Vienna and Geneva Conventions, both of which pertain to road sig ...
sign * Sign, in a
writing system A writing system is a method of visually representing verbal communication, based on a script and a set of rules regulating its use. While both writing and speech are useful in conveying messages, writing differs in also being a reliable form ...
: a basic unit. Similar terms which are more specific are character, letter or
grapheme In linguistics, a grapheme is the smallest functional unit of a writing system. The word ''grapheme'' is derived and the suffix ''-eme'' by analogy with ''phoneme'' and other names of emic units. The study of graphemes is called ''graphemics' ...
*
Commercial signage Signage is the design or use of signs and symbols to communicate a message. A signage also means signs ''collectively'' or being considered as a group. The term ''signage'' is documented to have been popularized in 1975 to 1980. Signs are any ...
, including
flashing sign A flashing sign is a sign that contains a sequential flashing light source where the period of time of illumination is equal to the period of non-illumination, and is used solely to attract attention in a non-informative way. The light can be int ...
s, such as on a retail store, factory, or theatre *
Signature A signature (; from la, signare, "to sign") is a handwritten (and often stylized) depiction of someone's name, nickname, or even a simple "X" or other mark that a person writes on documents as a proof of identity and intent. The writer of a ...
, in history: a handwritten depiction observed on a document to show authorship and will * For marketing or advocacy purposes, a
signage Signage is the design or use of signs and symbols to communicate a message. A signage also means signs ''collectively'' or being considered as a group. The term ''signage'' is documented to have been popularized in 1975 to 1980. Signs are any ...
refers to the collective use of signs to convey a message.


Philosophy


Stoicism

Stoic Stoic may refer to: * An adherent of Stoicism; one whose moral quality is associated with that school of philosophy *STOIC, a programming language * ''Stoic'' (film), a 2009 film by Uwe Boll * ''Stoic'' (mixtape), a 2012 mixtape by rapper T-Pain *' ...
philosophy recognizes two types of signs: indicative and commemorative (also known as "suggestive" or "mnemonic" or "recollective"). Indicative signs allow people to grasp truths about entities that have not been experienced. The commemorative sign does not
"admit of being observed in conjunction with the thing signified (for the naturally non-evident object is, from the start, imperceptible and therefore cannot be observed along with any of the things apparent), but entirely of its own nature and constitution, all but uttering its voice aloud, it is said to signify that whereof it is indicative."
Sextus Empiricus Sextus Empiricus ( grc-gre, Σέξτος Ἐμπειρικός, ; ) was a Ancient Greece, Greek Pyrrhonism, Pyrrhonist philosopher and Empiric school physician. His philosophical works are the most complete surviving account of ancient Greek and ...
''Outlines of Pyrrhonism'' Book II Section 317
The commemorative sign represents something that has previously been experienced in conjunction with its object. Consequently, the object of a commemorative sign can be described empirically.
"Thus the commemorative sign, when observed in conjunction with the thing signified in a clear perception, brings us as soon as it is presented and when the thing signified has become non-evident, to a recollection of the thing observed along with it and now no longer clearly perceived - as in the case of smoke and fire; for as we have often observed these to be connected with each other, as soon as we see the one-that is to say, smoke-we recall the other-that is to say, the unseen fire."
Sextus Empiricus Sextus Empiricus ( grc-gre, Σέξτος Ἐμπειρικός, ; ) was a Ancient Greece, Greek Pyrrhonism, Pyrrhonist philosopher and Empiric school physician. His philosophical works are the most complete surviving account of ancient Greek and ...
''Outlines of Pyrrhonism'' Book II Sections 315-317


Pyrrhonsim

Pyrrhonist Pyrrho of Elis (; grc, Πύρρων ὁ Ἠλεῖος, Pyrrhо̄n ho Ēleios; ), born in Elis, Greece, was a Greek philosopher of Classical antiquity, credited as being the first Greek skeptic philosopher and founder of Pyrrhonism. Life ...
philosophy rejects the validity of indicative signs as they are non-empirical. It recognizes only commemorative signs.


Christianity

St. Augustine was the first man who synthesized the classical and Hellenistic theories of signs. For him a sign is a thing which is used to signify other things and to make them come to mind ('' De Doctrina Christiana'' (hereafter DDC) 1.2.2; 2.1.1). The most common signs are spoken and written words (DDC 1.2.2; 2.3.4-2.4.5). Although God cannot be fully expressible, Augustine gave emphasis to the possibility of God’s communication with humans by signs in Scripture (DDC 1.6.6). Augustine endorsed and developed the classical and Hellenistic theories of signs. Among the mainstream in the theories of signs, i.e., that of Aristotle and that of Stoics, the former theory filtered into the works of Cicero (106-43 BC, ''De inventione rhetorica'' 1.30.47-48) and Quintilian (circa 35-100, ''Institutio Oratoria'' 5.9.9-10), which regarded the sign as an instrument of inference. In his commentary on Aristotle’s ''De Interpretatione'', Ammonius said, "according to the division of the philosopher Theophrastus, the relation of speech is twofold, first in regard to the audience, to which speech signifies something, and secondly in regard to the things about which the speaker intends to persuade the audience." If we match DDC with this division, the first part belongs to DDC Book IV and the second part to DDC Books I-III. Augustine, although influenced by these theories, advanced his own theological theory of signs, with whose help one can infer the mind of God from the events and words of Scripture. Books II and III of DDC enumerate all kinds of signs and explain how to interpret them. Signs are divided into natural (''naturalia'') and conventional (''data''); the latter is divided into animal (''bestiae'') and human (''homines''); the latter is divided into non-words (''cetera'') and words (''verba''); the latter is divided into spoken words (''voces'') and written words (''litterae''); the latter is divided into unknown signs (''signa ignota'') and ambiguous signs (''signa ambigua''); both the former and the latter are divided respectively into particular signs (''signa propria'') and figurative signs (''signa translata''), among which the unknown figurative signs belong to the pagans. In addition to exegetical knowledge (Quintilian, ''Institutio Oratoria'' 1.4.1-3 and 1.8.1-21) which follows the order of reading (''lectio''), textual criticism (''emendatio''), explanation (''enarratio''), and judgment (''iudicium''), one needs to know the original language (Hebrew and Greek) and broad background information on Scripture (DDC 2.9.14-2.40.60). Augustine’s understanding of signs includes several hermeneutical presuppositions as important factors. First, the interpreter should proceed with humility, because only a humble person can grasp the truth of Scripture (DDC 2.41.62). Second, the interpreter must have a spirit of active inquiry and should not hesitate to learn and use pagan education for the purpose of leading to Christian learning, because all truth is God’s truth (DDC 2.40.60-2.42.63). Third, the heart of interpreter should be founded, rooted, and built up in love which is the final goal of the entire Scriptures (DDC 2.42.63). The sign does not function as its own goal, but its purpose lies in its role as a signification (''res significans'', DDC 3.9.13). God gave signs as a means to reveal himself; Christians need to exercise hermeneutical principles in order to understand that divine revelation. Even if the Scriptural text is obscure, it has meaningful benefits. For the obscure text prevents us from falling into pride, triggers our intelligence (DDC 2.6.7), tempers our faith in the history of revelation (DDC 3.8.12), and refines our mind to be suitable to the holy mysteries (DDC 4.8.22). When interpreting signs, the literal meaning should first be sought, and then the figurative meaning (DDC 3.10.14-3.23.33). Augustine suggests the hermeneutical principle that the obscure Scriptural verse is interpreted with the help of plain and simple verses, which formed the doctrine of "scriptura scripturae interpres" (Scripture is the Interpreter of Scripture) in the Reformation Era. Moreover, he introduces the seven rules of Tyconius the Donatist to interpret the obscure meaning of the Bible, which demonstrates his understanding that all truth belongs to God (DDC 3.3.42-3.37.56). In order to apply Augustine's hermeneutics of the sign appropriately in modern times, every division of theology must be involved and interdisciplinary approaches must be taken.


See also

*
Asemic writing Asemic may refer to: * Asemia Asemia is the term for the medical condition of being unable to understand or express any signs or symbols. It is a more severe condition than aphasia, which is the inability to understand linguistic signs. Asemia i ...
*
Roland Barthes Roland Gérard Barthes (; ; 12 November 1915 – 26 March 1980) was a French literary theorist, essayist, philosopher, critic, and semiotician. His work engaged in the analysis of a variety of sign systems, mainly derived from Western popular ...
*
Commercial signage Signage is the design or use of signs and symbols to communicate a message. A signage also means signs ''collectively'' or being considered as a group. The term ''signage'' is documented to have been popularized in 1975 to 1980. Signs are any ...
*
Mary Douglas Dame Mary Douglas, (25 March 1921 – 16 May 2007) was a British anthropologist, known for her writings on human culture and symbolism, whose area of speciality was social anthropology. Douglas was considered a follower of Émile Durkhei ...
*
Semiotic theory of Charles Sanders Peirce Charles Sanders Peirce began writing on semiotics, which he also called semeiotics, meaning the philosophical study of signs, in the 1860s, around the time that he devised his system of three categories. During the 20th century, the term "semiot ...
*
Icon An icon () is a religious work of art, most commonly a painting, in the cultures of the Eastern Orthodox, Oriental Orthodox, and Catholic churches. They are not simply artworks; "an icon is a sacred image used in religious devotion". The most ...
*
Icon (computing) In computing, an icon is a pictogram or ideogram displayed on a computer screen in order to help the user navigate a computer system. The icon itself is a quickly comprehensible symbol of a software tool, function, or a data file, accessible on th ...
*
Ideogram An ideogram or ideograph (from Greek "idea" and "to write") is a graphic symbol that represents an idea or concept, independent of any particular language, and specific words or phrases. Some ideograms are comprehensible only by familiarit ...
*
Interpretation of dreams ''The Interpretation of Dreams'' (german: Die Traumdeutung) is an 1899 book by Sigmund Freud, the founder of psychoanalysis, in which the author introduces his theory of the unconscious with respect to dream interpretation, and discusses what w ...
*
Edmund Leach Sir Edmund Ronald Leach FRAI FBA (7 November 1910 – 6 January 1989) was a British social anthropologist and academic. He served as provost of King's College, Cambridge from 1966 to 1979. He was also president of the Royal Anthropologi ...
*
Claude Lévi-Strauss Claude Lévi-Strauss (, ; 28 November 1908 – 30 October 2009) was a French anthropologist and ethnologist whose work was key in the development of the theories of structuralism and structural anthropology. He held the chair of Social Anthro ...
*
List of symbols Many (but not all) graphemes that are part of a writing system that encodes a full spoken language are included in the Unicode standard, which also includes graphical symbols. See: * Language code * List of Unicode characters * List of writing s ...
*
Logotype A logo (abbreviation of logotype; ) is a graphic mark, emblem, or symbol used to aid and promote public identification and recognition. It may be of an abstract or figurative design or include the text of the name it represents as in a wordma ...
* Map-territory relation – view that an abstraction derived from something, or a reaction to it, is not the thing itself. *
Sorites paradox The sorites paradox (; sometimes known as the paradox of the heap) is a paradox that results from vague predicates. A typical formulation involves a heap of sand, from which grains are removed individually. With the assumption that removing a sing ...
*
Theseus' paradox The Ship of Theseus is a thought experiment about whether an object that has had all of its original components replaced remains the same object. According to legend, Theseus, the mythical Greek founder-king of Athens, had rescued the children of ...
*
Identity of indiscernibles The identity of indiscernibles is an ontological principle that states that there cannot be separate objects or entities that have all their properties in common. That is, entities ''x'' and ''y'' are identical if every predicate possessed by ''x'' ...
*
National symbol A national symbol is a symbol of any entity considering and manifesting itself to the world as a national community: the sovereign states but also nations and countries in a state of colonial or other dependence, federal integration, or even an ...
*
Neon sign In the signage industry, neon signs are electric signs lighted by long luminous gas-discharge tubes that contain rarefied neon or other gases. They are the most common use for neon lighting, which was first demonstrated in a modern form in Decem ...
*
Religious symbolism A religious symbol is an iconic representation intended to represent a specific religion, or a specific concept within a given religion. Religious symbols have been used in the military in many countries, such as the United States military chapl ...
*
Representation Representation may refer to: Law and politics *Representation (politics), political activities undertaken by elected representatives, as well as other theories ** Representative democracy, type of democracy in which elected officials represent a ...
*
Ferdinand de Saussure Ferdinand de Saussure (; ; 26 November 1857 – 22 February 1913) was a Swiss linguist, semiotician and philosopher. His ideas laid a foundation for many significant developments in both linguistics and semiotics in the 20th century. He is widel ...
*
Semiotics Semiotics (also called semiotic studies) is the systematic study of sign processes ( semiosis) and meaning making. Semiosis is any activity, conduct, or process that involves signs, where a sign is defined as anything that communicates something ...
*
Signing (disambiguation) Signing may refer to: * Using sign language * Signature, placing one's name on a document * Signature (disambiguation) A signature is a hand-written, possibly stylized, version of someone's name, which may be used to confirm the person's identi ...
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Structuralism In sociology, anthropology, archaeology, history, philosophy, and linguistics, structuralism is a general theory of culture and methodology that implies that elements of human culture must be understood by way of their relationship to a broader ...
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Symbol A symbol is a mark, sign, or word that indicates, signifies, or is understood as representing an idea, object, or relationship. Symbols allow people to go beyond what is known or seen by creating linkages between otherwise very different conc ...
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Synchronicity Synchronicity (german: Synchronizität) is a concept first introduced by analytical psychologist Carl G. Jung "to describe circumstances that appear meaningfully related yet lack a causal connection." In contemporary research, synchronicity ...
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Traffic sign Traffic signs or road signs are signs erected at the side of or above roads to give instructions or provide information to road users. The earliest signs were simple wooden or stone milestones. Later, signs with directional arms were introduce ...
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Universal language Universal language may refer to a hypothetical or historical language spoken and understood by all or most of the world's people. In some contexts, it refers to a means of communication said to be understood by all humans. It may be the idea of ...


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* {{Authority control Communication Semiotics Stoicism Pyrrhonism