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

intransitive verb

: to act or work with another or others : act together or in compliance
refused to cooperate with the police
: 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 Those worries dissipated a week later when Ohtani offered a detailed account to reporters at Dodger Stadium, saying Mizuhara stole from him and pledging to cooperate with any investigations. Michael S. Schmidt, New York Times, 13 Apr. 2024 This means that both the new leadership structure and the outgoing one will have to find a way to cooperate as Port-au-Prince continues to be overrun by ruthless gangs that have forced the shutdown of the main international airport and seaport for more than a month. Jacqueline Charles, Miami Herald, 12 Apr. 2024 This coalition of the malevolent is cooperating ever more closely. Eliot A. Cohen, The Atlantic, 10 Apr. 2024 The school is cooperating with the Englewood Police Department, which took over the case from the Littleton Police. Pilar Arias, Fox News, 10 Apr. 2024 Nobody but the originator and recipient have access to the contents of the file, all other parties are financially incentivized to cooperate, and redundancies ensure the payload is always available. Joel Khalili, WIRED, 10 Apr. 2024 In the letter to Lara, Hardin said State Farm would continue to cooperate with the state in finding a resolution to the home insurance crisis. Ruben Vives, Los Angeles Times, 10 Apr. 2024 By Melissa Locker and Chris Wilson April 6, 2024 5:50 AM EDT If the weather cooperates—that's a big if—Chicago residents should see a partial eclipse between 12:51 p.m. and 3:22 p.m., reaching peak totality (around 94%) at 2:07 p.m. Melissa Locker, TIME, 6 Apr. 2024 The driver stayed on the scene and cooperated with the investigation, the Sacramento County Sheriff’s Office said in a social media post. Ishani Desai, Sacramento Bee, 2 Apr. 2024

These examples are programmatically compiled from various online sources to illustrate current usage of the word 'cooperate.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.

Word History


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

Dictionary Entries Near cooperate

Cite this Entry

“Cooperate.” Dictionary, Merriam-Webster, Accessed 23 Apr. 2024.

Kids Definition


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!