Definitely Endangered Languages
Definiteness is a feature of noun phrases in grammatical theory. Definiteness may also refer to: * Counterfactual definiteness, a concept in quantum mechanics * For the definiteness of forms in multilinear algebra, see Definite quadratic form. See also * Definition (other) * Definitive (other) * Absolutely (other) Absolutely may refer to: * ''Absolutely'' (Boxer album), the second rock music album recorded by the band Boxer * ''Absolutely'' (Madness album), the 1980 second album from the British ska band Madness * ''Absolutely'' (ABC album), a comprehensi ...

Definiteness
In linguistics, definiteness is a semantic feature of noun phrases, distinguishing between referents or senses that are identifiable in a given context (definite noun phrases) and those which are not (indefinite noun phrases). The prototypical definite noun phrase picks out a unique, familiar, specific referent such as ''the sun'' or ''Australia'', as opposed to indefinite examples like ''an idea'' or ''some fish''. There is considerable variation in the expression of definiteness across languages, and some languages such as Japanese do not generally mark it so that the same expression could be definite in some contexts and indefinite in others. In other languages, such as English, it is usually marked by the selection of determiner (e.g., ''the'' vs ''a''). In still other languages, such as Danish, definiteness is marked morphologically. Definiteness as a grammatical category There are times when a grammatically marked definite NP is not in fact identifiable. For example, ' ...
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Counterfactual Definiteness
In quantum mechanics, counterfactual definiteness (CFD) is the ability to speak "meaningfully" of the definiteness of the results of measurements that have not been performed (i.e., the ability to assume the existence of objects, and properties of objects, even when they have not been measured). The term "counterfactual definiteness" is used in discussions of physics calculations, especially those related to the phenomenon called quantum entanglement and those related to the Bell inequalities. In such discussions "meaningfully" means the ability to treat these unmeasured results on an equal footing with measured results in statistical calculations. It is this (sometimes assumed but unstated) aspect of counterfactual definiteness that is of direct relevance to physics and mathematical models of physical systems and not philosophical concerns regarding the meaning of unmeasured results. "Counterfactual" may appear in physics discussions as a noun. What is meant in this context is "a ...
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Definite Quadratic Form
In linguistics, definiteness is a semantic feature of noun phrases, distinguishing between referents or senses that are identifiable in a given context (definite noun phrases) and those which are not (indefinite noun phrases). The prototypical definite noun phrase picks out a unique, familiar, specific referent such as ''the sun'' or ''Australia'', as opposed to indefinite examples like ''an idea'' or ''some fish''. There is considerable variation in the expression of definiteness across languages, and some languages such as Japanese do not generally mark it so that the same expression could be definite in some contexts and indefinite in others. In other languages, such as English, it is usually marked by the selection of determiner (e.g., ''the'' vs ''a''). In still other languages, such as Danish, definiteness is marked morphologically. Definiteness as a grammatical category There are times when a grammatically marked definite NP is not in fact identifiable. For example, ' ...
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Definition (other)
A definition is a statement of the meaning of a term. Definition may also refer to: Science, mathematics and computing * In computer programming languages, a declaration that reserves memory for a variable or gives the body of a subroutine * Defining equation (physics), physical quantities defined in terms of others, in the form of an equation * Defining equation (physical chemistry), physico-chemical quantities defined in terms of others, in the form of an equation * Dynamical system (definition), description of a mathematical model, determined by a system of coupled differential equations * Circular definition, lexicographic, linguistic and logical aspects * Mathematics: ** Intensional definition ** Elementary definition ** Algebraic definition ** Recursive definition ** Field of definition ** A continuous function ** A well-defined function Music and TV * High-definition television, a television format with higher resolution * ''Definition'' (album), a 1992 studio albu ...
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Definitive (other)
Definitive may refer to: * ''Definitive'' (TV series), an American music television series * Definitive stamp, a postage stamp that is part of a regular issue of a country's stamps available for sale by the postal service See also * Definiteness (other) * Definition (other) A definition is a statement of the meaning of a term. Definition may also refer to: Science, mathematics and computing * In computer programming languages, a declaration that reserves memory for a variable or gives the body of a subroutine * D ...