✨📕 The NEWThe NEW Collegiate Dictionary, 12th Edition Over 5,000 words added — Buy Now! Collegiate DictionaryBuy Now!

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.
Meanwhile, the city jail in New Orleans, under longstanding oversight from a federal judge, does not cooperate with ICE under most circumstances, and its police department views immigration enforcement as a civil matter outside its jurisdiction, the AP reported. Hollie Silverman, MSNBC Newsweek, 30 Nov. 2025 Both drivers remained at the scene to cooperate with the investigation, deputies said. Dean Fioresi, CBS News, 30 Nov. 2025 The family has cooperated fully with law-enforcement in their ongoing efforts to locate Travis. Jack Moore, ABC News, 29 Nov. 2025 Al-Jama’a al-Islamiyya, founded as the Lebanese branch of the Muslim Brotherhood, has cooperated with Hamas and Hezbollah, maintaining infrastructure in southern Lebanon and along the Syria-Lebanon border. Efrat Lachter, FOXNews.com, 28 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 2 Dec. 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!