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

Definition of cooperate

intransitive verb

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

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Other Words from cooperate

cooperator \ kō-​ˈä-​pə-​ˌrā-​tər How to pronounce cooperator (audio) \ noun

Examples of cooperate in a Sentence

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.
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Recent Examples on the Web The confusion over who should be in charge in Kabul is the latest in a long series of conflicts and standoffs that have sorely tested the ability of competing Afghan leaders to hold and honor fair elections, and to cooperate well enough to govern. Mujib Mashal, New York Times, "Afghan Vote Crawls Toward Crisis, With No Results After 2 Months," 22 Nov. 2019 Johnson’s co-defendant, Joshua Davis, 30, has also pleaded guilty to conspiracy to locate and kill an individual believed to be cooperating with federal authorities, the office wrote, and was sentenced to 100 months in prison. Phil Davis,, "Baltimore man pleads guilty in Pennsylvania triple homicide case," 21 Nov. 2019 The younger Cappola has agreed to take a polygraph test and cooperate with law enforcement, Moldea said. John Wisely, Detroit Free Press, "Move over 'The Irishman,' search for Jimmy Hoffa may have new lead," 21 Nov. 2019 Before the moratorium was imposed in March 2019, the government had started to tentatively cooperate with the EU on return matters. Franzisca Zanker, Quartz Africa, "The return of migrants from Europe is causing problems for The Gambia," 21 Nov. 2019 The defendants also agreed to pay Wilson $1,000 and $5,000 for attorneys’ fees to the ACLU, according to a copy of the agreement sent by ACLU cooperating attorney Joe Mead. Eric Heisig, cleveland, "Summit County settles panhandler’s lawsuit, changes law as part of agreement," 19 Nov. 2019 Deputies said the other driver, whose car rolled after hitting the dump truck, suffered minor injuries and is cooperating with investigators. oregonlive, "I-84 reopened after fatal dump truck crash closes freeway Tuesday morning," 19 Nov. 2019 Much of this messaging has taken aim at the career public servants cooperating with the House impeachment inquiry. Anchorage Daily News, "Attacking witnesses is Trump’s core defense strategy in fighting impeachment," 19 Nov. 2019 Android devices do not get kernel updates, probably thanks to the incredible amount of work needed to produce just a single device kernel, and the chain of companies that would need to cooperate to do it. Ron Amadeo, Ars Technica, "Google outlines plans for mainline Linux kernel support in Android," 19 Nov. 2019

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.

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First Known Use of cooperate

1582, in the meaning defined at sense 1

History and Etymology for cooperate

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

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Time Traveler for cooperate

Time Traveler

The first known use of cooperate was in 1582

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Statistics for cooperate

Last Updated

26 Nov 2019

Cite this Entry

“Cooperate.” The Dictionary, Merriam-Webster Inc., Accessed 8 December 2019.

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More Definitions for cooperate


How to pronounce cooperate (audio)

English Language Learners Definition of cooperate

: to work together : to work with another person or group to do something
: to be helpful by doing what someone asks or tells you to do
: to act in a way that makes something possible or likely : to produce the right conditions for something to happen


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

Kids Definition of cooperate

: to act or work together so as to get something done

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Comments on cooperate

What made you want to look up cooperate? Please tell us where you read or heard it (including the quote, if possible).


to constrict the range or activity of

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