cooperate

verb

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

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.
Iranian officials have said the June attacks undermined the credibility of the IAEA, which has in turn urged Tehran to cooperate more closely with its experts. Ellie Cook, MSNBC Newsweek, 16 Nov. 2025 But Margate police say Terrelonge last saw Gabrielle in Kissimmee in April – when investigators believe Davis left that city with the child – and that Terrelonge is cooperating with the investigation. Nicquel Terry Ellis, CNN Money, 15 Nov. 2025 Phil DiMartino, a police spokesman, the driver of the SUV remained on scene after the crash and has been cooperating with the investigation. Kendrick Calfee, Kansas City Star, 15 Nov. 2025 Podesta appears to have cooperated with investigators and recorded multiple meetings between Williamson and Campbell in the summer of 2024 via phone calls and at a restaurant in downtown Sacramento. Nicole Nixon, Sacbee.com, 14 Nov. 2025 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 19 Nov. 2025.

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

More from Merriam-Webster on cooperate

Last Updated: - Updated example sentences
Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!