definition — English
- An assemblage of persons or objects gathered or located together; an aggregation: a group of dinner guests; a group of buildings near the road.
- A number of individuals or things considered together because of similarities: a small group of supporters across the country.
- A stratigraphic unit, especially a unit consisting of two or more formations deposited during a single geologic era.
- Mathematics A set with a binary associative operation such that the operation admits an identity element and each element of the set has an inverse element for the operation.