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

Groups of people

* Cultural group, a group whose members share the same cultural identity *

Ethnic group An ethnic group or an ethnicity is a grouping of people who identify with each other on the basis of shared attributes that distinguish them from other groups. Those attributes can include common sets of traditions, ancestry, language, history, ...

, 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, 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 In sociology and social psychology, an in-group is a social group to which a person psychologically identifies as being a member. By contrast, an out-group is a social group with which an individual does not identify. People may for example ide ...

* Primary, secondary, and reference groups * Social group * Collectives

Science and technology

Mathematics

* Group (mathematics), 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 is a name service database used to store group information on Unix-like operating systems. The sources for the group database (and hence the sources for groups on a system) are configured, like other name service databases, in nsswitch.conf ...

Group (online social networking) A group (often termed as a community, e-group or club) is a feature in many social networking services which allows users to create, post, comment to and read from their own interest- and niche-specific forums, often within the realm of virtual co ...

* Usenet newsgroup * Google Groups * Yahoo! Groups *

Facebook groups Facebook is a social-network service website launched on February 4, 2004 by Mark Zuckerberg. The following is a list of software and technology features that can be found on the Facebook website and mobile app and are available to users of ...

Other uses in science and technology

Group (stratigraphy) In geology, a group is a lithostratigraphic unit consisting of a series of related formations that have been classified together to form a group. Formations are the fundamental unit of stratigraphy. Groups may sometimes be combined into superg ...

, in geology, consisting of formations or rock strata *

Cultivar group A Group (previously cultivar-groupInternational Code of Nomenclature for Cultivated Plants, 4th edition (1969), 5th edition (1980) and 6th edition (1995)) is a formal category in the ''International Code of Nomenclature for Cultivated Plants'' ('' ...

, in biology, a classification category in the ''International Code of Nomenclature for Cultivated Plants'' * Galaxy groups and clusters, in cosmology * Group (firearms), the grouping of shots from a firearm * Language group, a unit of classification within a Language family

Other uses

* Breed Groups (dog), 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 the ...

, 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 by ...

* Militia groups * Rebel groups * Terrorist groups * Group (military unit), an air force formation * Corporate group, 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, ...