Group

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Look up group in Wiktionary, the free dictionary.

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, 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
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 (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, 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 category of car allowed to compete in auto racing
Army group
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