A group is a number of persons or things that are located, gathered, or classed together.

Groups of people

Cultural group Cultural identity is a part of a person's identity, or their self-conception and self-perception, and is related to nationality, ethnicity, religion, social class, generation, locality or any kind of social group that has its own distinct cultu ...

, a group whose members share the same cultural identity * Ethnic group, a group whose members share the same ethnic identity * Religious group (disambiguation), a group whose members share the same religious identity * Social group, a group whose members share the same social identity *

Tribal group The term tribe is used in many different contexts to refer to a category of human social group. The predominant worldwide usage of the term in English is in the discipline of anthropology. This definition is contested, in part due to confli ...

, a group whose members share the same tribal identity * Organization, an entity that has a collective goal and is linked to an external environment * Peer group, an entity of three or more people with similar age, ability, experience, and interest

Social science

* In-group and out-group * Primary, secondary, and reference groups * Social group *

Collectives A collective is a group of entities that share or are motivated by at least one common issue or interest, or work together to achieve a common objective. Collectives can differ from cooperatives in that they are not necessarily focused upon an ...

Science and technology

Mathematics

Group (mathematics) In mathematics, a group is a set and an operation that combines any two elements of the set to produce a third element of the set, in such a way that the operation is associative, an identity element exists and every element has an inverse. ...

, a set together with a binary operation satisfying certain algebraic conditions

Chemistry

* Functional group, a group of atoms which provide some property to a molecule * Group (periodic table), a column in the periodic table of chemical elements

Computing and the Internet

* Group (computing), a collection of users or other objects * Group (database) * Group (online social networking) * Usenet newsgroup * Google Groups * Yahoo! Groups * Facebook groups

Other uses in science and technology

* Group (stratigraphy), in geology, consisting of formations or rock strata * Cultivar group, in biology, a classification category in the ''International Code of Nomenclature for Cultivated Plants'' *

Galaxy groups and clusters Galaxy groups and clusters are the largest known gravitationally bound objects to have arisen thus far in the process of cosmic structure formation. They form the densest part of the large-scale structure of the Universe. In models for the grav ...

, in cosmology *

Group (firearms) In shooting sports, a shot grouping, or simply group, is the collective pattern of projectile impacts on a target from multiple consecutive shots taken in one shooting session. The ''tightness'' of the grouping (the proximity of all the shots t ...

, the grouping of shots from a firearm * Language group, a unit of classification within a

Language family A language family is a group of languages related through descent from a common ''ancestral language'' or ''parental language'', called the proto-language of that family. The term "family" reflects the tree model of language origination in hi ...

Other uses

Breed Groups (dog) Dog types are broad categories of domestic dogs based on form, function, or style of work, lineage, or appearance. Some may be locally adapted dog types (or '' landraces'') that may have the visual characteristics of a modern purebred dog. In ...

, the group or category to which breeds of dogs are assigned by kennel clubs *

Group (auto racing) A FIA Group is a category of car allowed to compete in auto racing. The FIA Appendix J to the international motor sports code defines the various Groups. While a given racing car may fit into a FIA Group, local rules still may either prohibit th ...

, a category of car allowed to compete in auto racing *

Army group An army group is a military organization consisting of several field armies, which is self-sufficient for indefinite periods. It is usually responsible for a particular geographic area. An army group is the largest field organization handled b ...

Militia groups A militia () is generally an army or some other fighting organization of non- professional soldiers, citizens of a country, or subjects of a state, who may perform military service during a time of need, as opposed to a professional force of ...

Rebel groups Rebellion, uprising, or insurrection is a refusal of obedience or order. It refers to the open resistance against the orders of an established authority. A rebellion originates from a sentiment of indignation and disapproval of a situation and ...

* Terrorist groups * Group (military unit), an air force formation *

Corporate group A corporate group or group of companies is a collection of parent and subsidiary corporations that function as a single economic entity through a common source of control. These types of groups are often managed by an account manager. The concept ...

, a group of affiliated companies * Group psychotherapy, sometimes colloquially known as "group" *

Musical ensemble A musical ensemble, also known as a music group or musical group, is a group of people who perform instrumental and/or vocal music, with the ensemble typically known by a distinct name. Some music ensembles consist solely of instrumentalists, ...