cooperation

noun

co·​op·​er·​a·​tion (ˌ)kō-ˌä-pə-ˈrā-shən How to pronounce cooperation (audio)
Synonyms of cooperationnext
1
: the actions of someone who is being helpful by doing what is wanted or asked for : common effort
We are asking for your full cooperation.
2
: association of persons for common benefit
established trade and economic cooperations

Examples of cooperation in a Sentence

The report cited a lack of cooperation between state and local officials. Thank you for your cooperation. We are asking for your full cooperation.
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.
The framework sought to promote regional security and cooperation among Persian Gulf states without external military involvement. Miranda Jeyaretnam, Time, 7 Apr. 2026 The team has put millions into cosmetic renovations – like painting, the Diamond Club and the parking lots – but more cooperation with the city will be necessary to fund any major renovations or even a new stadium. Jeff Fletcher, Oc Register, 6 Apr. 2026 Iraqi Foreign Minister Fuad Hussein, who met Iran’s ambassador on Sunday, said the two countries agreed on the need to continue their cooperation on allowing Iraqi oil to pass through Hormuz. Boston Herald Wire Services, Boston Herald, 5 Apr. 2026 The cooperative birth behavior may reflect ancient evolutionary traits in toothed whales — and evidence of complex social cooperation beyond primates. Samantha Agate, Fort Worth Star-Telegram, 4 Apr. 2026 See All Example Sentences for cooperation

Word History

Etymology

see cooperate

First Known Use

15th century, in the meaning defined at sense 1

Time Traveler
The first known use of cooperation was in the 15th century

Browse Nearby Words

Cite this Entry

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

Kids Definition

cooperation

noun
co·​op·​er·​a·​tion kō-ˌäp-ə-ˈrā-shən How to pronounce cooperation (audio)
: the act or process of cooperating

More from Merriam-Webster on cooperation

Love words? Need even more definitions?

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

More from Merriam-Webster