Gang (Noun)

1. a group or band: A gang of boys gathered around the winning pitcher.
2. a group of youngsters or adolescents who associate closely, often exclusively, for social reasons, esp. such a group engaging in delinquent behavior.
3. 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.
4. a group of persons working together; squad; shift: a gang of laborers.
5. a group of persons associated for some criminal or other antisocial purpose: a gang of thieves.

* Excerpted from the Random House Webster's Unabridged Dictionary 3.0.