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 Becerra says Facebook has hampered the investigation by refusing to fully cooperate with the state’s subpoenas. Wired, "California Reveals It’s Been Investigating Facebook," 6 Nov. 2019 Duffey hasn’t been expected to show up for his deposition ever since Russ Vought, the acting director of OMB, said that the office wouldn’t cooperate with the probe. NBC News, "More witnesses expected to skip impeachment depositions Tuesday," 5 Nov. 2019 An agency spokeswoman said its officials are simply abiding by the White House's directive, which is that the impeachment inquiry is illegitimate and the administration is not cooperating. Anchorage Daily News, "Mulvaney allies to lead stonewall against Democrats’ impeachment inquiry," 4 Nov. 2019 Trump has said his administration will not cooperate, and Kupperman has said he is caught between the two., "The week ahead in the Trump impeachment inquiry: Democrats seek John Bolton’s testimony, prepare to release transcripts," 4 Nov. 2019 Ivey and another corrections officer agreed to cooperate with the on-going investigation. Adam Ferrise, cleveland, "Jury deadlocked 11-1 along racial lines in trial of white Cuyahoga County Jail officer accused of attacking black inmate," 30 Oct. 2019 On Monday, Vought tweeted that neither official would cooperate with the House impeachment inquiry. Mary Spicuzza, Milwaukee Journal Sentinel, "House impeachment investigators issue subpoena to former Wisconsin Republican leader," 25 Oct. 2019 That’s the plain meaning of the announcement that his administration will not cooperate in any way with the House impeachment inquiry. Mona Charen, National Review, "Accountability in the Trump Administration," 11 Oct. 2019 The Trump administration has refused to cooperate with congressional subpoenas and requests for information, and continues to receive the unconditional support of most Republicans for the president. Eric Schickler, The Conversation, "Investigations usually hurt a president’s public reputation – but Trump isn’t usual," 8 Oct. 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

12 Nov 2019

Cite this Entry

“Cooperate.” The Dictionary, Merriam-Webster Inc., Accessed 22 November 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).


not agreeing with established beliefs

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