co·​op·​er·​ate kō-ˈä-pə-ˌrāt How to pronounce cooperate (audio)
cooperated; cooperating; cooperates

intransitive verb

: to act or work with another or others : act together or in compliance
refused to cooperate with the police
: to associate with another or others for mutual benefit
nations cooperating to fight terrorism
cooperator noun

Example Sentences

It will be much easier if everyone cooperates. Several organizations cooperated in the relief efforts. The country agreed to cooperate with the other nations on the trade agreement. The mother asked the child to put on his pajamas, but the child refused to cooperate. Witnesses were willing to cooperate.
Recent Examples on the Web The Good Guy award, which began in 1968, goes to a member of the Guardians’ organization who not only understands the media’s job, but does their part to cooperate. Paul Hoynes, cleveland, 27 Nov. 2022 Those considerations have to weighed against the need to cooperate on the geopolitical stage and the essence of showing a united front. Raf Casert, Fortune, 25 Nov. 2022 The complaint also states that Brue was dishonest in her answers to the commission during the investigation and failed to cooperate fully. Emma Stein, Detroit Free Press, 24 Nov. 2022 The 35-nation IAEA board adopted a resolution last week criticizing Iran, demanding Tehran urgently cooperate with the IAEA’s investigation into traces of uranium found at three undeclared sites. Dan De Luce, NBC News, 22 Nov. 2022 There’s a reason humans still cooperate and share—our brains get something out of having connections with other people. Alana Semuels, Time, 21 Nov. 2022 To help build the hush-money case, prosecutors are revisiting another strategy that has yet to work: pressuring a top Trump lieutenant, Allen Weisselberg, to cooperate. William K. Rashbaum,, 21 Nov. 2022 Now that there is legislative language allowing the police to request live access to camera technology, the concern is that the police will put pressure on the tech companies to cooperate. Brian X. Chen, New York Times, 15 Nov. 2022 The world’s three largest rainforest nations Brazil, Democratic Republic of Congo and Indonesia on Monday formally launched a partnership to cooperate on forest preservation after a decade of on-off talks on a trilateral alliance. Reuters, CNN, 14 Nov. 2022 See More

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'cooperate.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

Word History


Late Latin cooperatus, past participle of cooperari, from Latin co- + operari to work — more at operate

First Known Use

1582, in the meaning defined at sense 1

Time Traveler
The first known use of cooperate was in 1582

Dictionary Entries Near cooperate

Cite this Entry

“Cooperate.” Dictionary, Merriam-Webster, Accessed 4 Dec. 2022.

Kids Definition



co·​op·​er·​ate kō-ˈäp-(ə-)ˌrāt How to pronounce cooperate (audio)
cooperated; cooperating
: to act, work, or associate with others so as to get something done

More from Merriam-Webster on cooperate

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