· any number of entities (members) considered as a unit

Synonym(s): grouping

Hypernym(s): abstraction, abstract_entity

· (chemistry) two or more atoms bound together as a single unit and forming part of a molecule

Synonym(s): radical, chemical_group

Hypernym(s): unit, building_block

· a set that is closed, associative, has an identity element and every element has an inverse

Synonym(s): mathematical_group

Hypernym(s): set

· arrange into a group or groups; "Can you group these shapes together?"

Hypernym(s): classify, class, sort, assort, sort_out, separate

· form a group or group together

Synonym(s): aggroup

Hypernym(s): meet, gather, assemble, forgather, foregather