Group

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

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