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 Facing up to 10 years in prison, Horn is believed to be cooperating with prosecutors in pursuit of a lighter sentence. Tim Sullivan, The Courier-Journal, "Former Louisville football captain Robert McCune pleads not guilty in NFL fraud case," 4 Jan. 2020 The driver of the car, whose information was not released, stayed on the scene and cooperated with authorities. Alejandro Serrano,, "Woman, teen injured after being struck by cars in separate San Francisco incidents," 3 Jan. 2020 For months, Nissan’s efforts to cooperate with the investigation were led by Hari Nada, a top official at the company who is expected to be a key witness against Mr. Ghosn. Ben Dooley, New York Times, "Carlos Ghosn Flirted With Hollywood, Then Delivered a Plot Twist," 2 Jan. 2020 The 22-year-old woman driving the car cooperated on scene and was not ticketed or arrested, Botsch said. Elliot Hughes, Milwaukee Journal Sentinel, "The man struck and killed by a car in West Allis has been identified," 2 Jan. 2020 California and Illinois challenged attempts to withhold Justice Department grants from jurisdictions that don’t cooperate with federal immigration enforcement. Matt Ford, The New Republic, "A Decade of Legal Warfare Has Warped America’s Future," 30 Dec. 2019 Western democracies need to recognize what’s at stake and cooperate to manage and protect internet openness. Chicago Tribune, Twin Cities, "Other voices: Keep the internet open and free — worldwide," 29 Dec. 2019 Workers were told they would be deported if they were found to have cooperated with the investigation., "Fair pay a distant dream for produce packers in Rio Grande Valley," 28 Dec. 2019 The arrest of Villegas confirmed that Mexican law enforcement cooperates with drug gangs, LeBaron said. Fox News, "Mexico authorities arrest police chief for suspected link to cartel massacre that killed 9 Americas," 28 Dec. 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

8 Jan 2020

Cite this Entry

“Cooperate.” The Dictionary, Merriam-Webster Inc., Accessed 17 January 2020.

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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).


a plan in which a last survivor takes all

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