- to work or act together
- to be of assistance or be willing to assist
- (of firms, workers, consumers, etc) to engage in economic cooperation
WordReference Random House Learner's Dictionary of American English © 2026
co•op•er•ate or co-op•er•ate/koʊˈɑpəˌreɪt/USA pronunciation
v., -at•ed, -at•ing.
co•op•er•a•tor, n. [countable]See -oper-.
WordReference Random House Unabridged Dictionary of American English © 2026- to work together for a common purpose:[no object; sometimes: ~ + with + object]The New York City police cooperated with the force in Boston in catching the crook.
co•op•er•a•tor, n. [countable]See -oper-.
- cooperate is a verb, cooperative is an adjective, cooperation is a noun:He cooperates with his fellow workers. She is very cooperative at work. There wasn't much cooperation between the two departments.
co•op•er•ate
(kō op′ə rāt′),USA pronunciation v.i., -at•ed, -at•ing.
co•op′er•a′tor, co-op′er•a′tor, n.
- to work or act together or jointly for a common purpose or benefit.
- to work or act with another or other persons willingly and agreeably.
- Businessto practice economic cooperation.
- Late Latin cooperātus past participle of cooperārī to work with. See co-, operate
- 1595–1605
- 2. collaborate, join, participate.
Collins Concise English Dictionary © HarperCollins Publishers::
cooperate, co-operate /kəʊˈɒpəˌreɪt/ vb (intransitive)
'cooperate' also found in these entries (note: many are not synonyms or translations):
amenable
- ball
- collaborate
- concur
- cooperative
- diaeresis
- Freecycle
- passive resistance
- pitch in
- play along
- pull together
- refusenik
- team spirit
- adversaryism
- alliance
- arm
- bucket brigade
- connive
- conspire
- cooperation
- degree
- dieresis
- ecumenical
- give
- help
- hip
- holdout
- largely
- new world order
- noncooperation
- play
- Stockholm syndrome
- sure thing