Definition of cooperate in English:

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Pronunciation: /kōˈäpəˌrāt/


[no object]
1Act jointly; work toward the same end: the leaders promised to cooperate in ending the civil war
More example sentences
  • We have said that we will cooperate in these three areas of logistic support and use of airspace.
  • But what is most important is that everyone should cooperate in using water much less.
  • All of us should cooperate in maintaining law and order and in promoting peace and brotherliness.
1.1Assist someone or comply with their requests: I was the villain for not cooperating with the FBI
More example sentences
  • But he is reportedly cooperating with authorities, and has not officially been charged with any crime in connection with the case.
  • The bank is fully cooperating with the investigation, he said.
  • They're cooperating with police; they've gone in and they've done the right thing.
collaborate, work together, work side by side, pull together, band together, join forces, team up, unite, combine, pool resources, make common cause, liaise
be of assistance, assist, help, lend a hand, be of service, do one's bit
informal play ball



Pronunciation: /kōˈäp(ə)rənt/
Example sentences
  • She was approached by this group for a cooperant.
  • The most recent reports from cooperants in the area describe the disaster as beyond comprehension.
  • On arrival in the field, cooperants receive a general orientation with country specific information.


Pronunciation: /kōˈäpəˌrādər/
Example sentences
  • The first step is to divide the civilian world into two, separating the trustworthy cooperators from the noncooperators, so we don't have to search every car, package, and pocket.
  • Not all humans are active cooperators with this conspiracy (though some are).
  • It is time for the two peoples to shift from competitors to cooperators.


Late 16th century: from ecclesiastical Latin cooperat- 'worked together', from the verb cooperari, from co- 'together' + operari 'to work'.

Words that rhyme with cooperate


For editors and proofreaders

Syllabification: co·op·er·ate

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