a group or band

A gang of boys gathered around the winning pitcher.

a group of youngsters or adolescents who associate closely, often exclusively, for social reasons, esp. such a group engaging in delinquent behavior.

a group of people with compatible tastes or mutual interests who gather together for social reasons

I'm throwing a party for the gang I bowl with.

a group of persons working together; squad; shift

a gang of laborers.

a group of persons associated for some criminal or other antisocial purpose

a gang of thieves.

a set of tools, electronic components or circuits, oars, etc., arranged to work together or simultaneously.

a group of identical or related items.

to arrange in groups or sets; form into a gang

to gang illustrations for more economical printing on one sheet.

to attack in a gang.

to form or act as a gang

Cutthroats who gang together hang together.

gang up on, Informal . (of a number of persons) to unite in opposition to (a person); combine against

The bigger boys ganged up on the smaller ones in the schoolyard.

noun

assemblage , band , bunch , circle , clan , clique , club , cluster , combo , company , coterie , crew , crowd , herd , horde , knot , lot , organization , outfit , pack , party , posse , ring , set , shift , squad , syndicate , team , tribe , troop , troupe , workers , zoo , body , corps , detachment , unit , cabal , camorrista , canaille , carbonari , group , mob , number

phrasal verb

combine , league , unite