supergroup

Short definition from Wiktionary

Noun

1. 1
   Any group composed of other groups: The group to which a subgroup belongs.
2. 2
   Any group composed of other groups: A group of musicians, each a star of another band (especially in rock music).
3. 3
   Any group composed of other groups: A generalization of groups, used in the study of supersymmetry.
4. 4
   Any group composed of other groups: In the L-carrier system, a multiplexed group of channel groups.
5. 5
   Any group composed of other groups: A sequence of groups of formations that compose a coherent unit.