groupˈ-captain noun

A Royal Air Force officer of equivalent rank to a colonel or naval captain

group discussion noun

A meeting in which a group of people share their opinions on a particular subject (eg as a market research method, etc)

group dynamics singular noun (psychology)

The interaction of human behaviour within a small social group

group insurance noun

Insurance issued on a number of people under a single policy

group marriage noun

A hypothetical primitive relationship by which every man of a group is husband to every woman of a group

group practice noun

A medical practice in which several doctors work together as partners

group selection noun

A form of natural selection proposed to explain the evolution of behaviour which apparently is to the long-term good of a group or species, rather than to the immediate good of the individual

group sex noun

Sexual activity in which more than two people take part simultaneously

group theory noun (mathematics)

The investigation of the properties of groups

group therapy noun

Therapy in which a small group of people with the same psychological or physical problems discuss their difficulties under the chairmanship of eg a doctor

groupˈthink noun

A philosophy to which all members of an organization are expected to conform, and which stifles individual opinions

group trading noun (business)

The practice by a number of traders of joining up, eg to improve distribution, cut administration costs, etc

groupˈware noun (comput sl)

Software that supports group activity

groupˈwork or group work noun

Work, eg in a school or office, carried out by a number of people acting together

Group of Five, Seven, Eight, Ten, etc

(also G5, G7, G8, G10 or G-5, G-7, G-8, G-10, etc) various groups of economically powerful countries, all including France, Britain, Germany, United States and Japan, which have met to discuss matters of mutual interest

pop group see pop²