1 willing to cooperate [= helpful; ≠ uncooperative]:
He was doing his best to be cooperative.
a cooperative witness
He was doing his best to be cooperative.
a cooperative witness2 made, done, or operated by people working together :
a co-operative venture between the City Council and the police
a co-operative venture between the City Council and the police3 a cooperative store, bank etc is operated by people working together as a cooperative :
a co-operative store in a provincial town
a co-operative store in a provincial town —cooperatively adverb

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