A group of convicts chained together to work outside the confines of a prison. / (cycling) A group of cyclists riding in a close-knit formation akin to a road race, normally for the purposes of training.

A body of men employed to force others into military or naval service.

To force men into military or naval service. / To coerce somebody into doing something that they are reluctant to do.

A group of workers who do road repairs.

Any distinguishing mark, such as a tattoo, that serves to identify a member of a particular gang

A gang sign.

(transitive, idiomatic) To join together in a group in order to overpower someone else.

(idiomatic) To join together, as a gang.

A rape involving more than one perpetrator.

present participle of gang up