co‧op‧e‧ra‧tive1 also co-operative British English
willing to cooperate [= helpful; ≠ uncooperative]:
He was doing his best to be cooperative.
a cooperative witness
made, done, or operated by people working together:
a co-operative venture between the City Council and the police
a cooperative store, bank etc is operated by people working together as a cooperative:
a co-operative store in a provincial town