cooperate

verb

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

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
cooperator 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.
Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Defense attorney Mary Chartier argued that there was reasonable doubt in the case, saying Dale Warner denied hurting his wife and cooperated with investigators during the search. Sarah Rumpf-Whitten, FOXNews.com, 5 Apr. 2026 The surplus charges the auxiliary battery, ready to deploy whenever the sky doesn't cooperate. Omar Kardoudi april 05, New Atlas, 5 Apr. 2026 For Javier Hernandez, cooperating with federal prosecutors felt like the only option. James Queally, Los Angeles Times, 5 Apr. 2026 The driver of the Subaru remained at the scene to cooperate with the investigation, police said. Dean Fioresi, CBS News, 5 Apr. 2026 See All Example Sentences for cooperate

Word History

Etymology

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

Browse Nearby Words

Cite this Entry

“Cooperate.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/cooperate. Accessed 8 Apr. 2026.

Kids Definition

cooperate

verb
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

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