cooperation

noun

co·​op·​er·​a·​tion (ˌ)kō-ˌä-pə-ˈrā-shən 

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

cooperationist

(ˌ)kō-ˌä-pə-ˈrā-sh(ə-)nist 

noun

Synonyms

• affiliation
• alliance
• association
• collaboration
• confederation
• connection
• hookup
• liaison
• linkup
• partnership
• relation
• relationship
• tie-up
• union

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

That level of cooperation is critical to solving the problem, Parker said, because partisan fights have done nothing to help kids read. —Silas Allen, Fort Worth Star-Telegram, 4 Apr. 2025

Economic trade and investment spanning the Pacific provide powerful incentives for cooperation, mitigating tensions from China’s steady expansion as a regional and now global military power. —Arthur I. Cyr, Chicago Tribune, 3 Apr. 2025

He's been offering joint multibillion-dollar deals on rare earth minerals and cooperation on energy exploration and shipping routes in the Arctic. —Natalia Drozdiak and Stephanie Lai Bloomberg News, Arkansas Online, 3 Apr. 2025

Izvestia reported the cooperation may be further discussed at the next round of Russia-U.S. talks that may take place in mid-April in Saudi Arabia. —Reuters, USA Today, 31 Mar. 2025

Word History

Etymology

see cooperate

First Known Use

15th century, in the meaning defined at sense 1

Rhymes for cooperation

• abbreviation
• abomination
• acceleration
• accentuation
• accommodation
• accreditation
• acculturation
• accumulation
• acetylation
• adjudication
• administration
• adulteration

Kids Definition

cooperation

noun

co·​op·​er·​a·​tion kō-ˌäp-ə-ˈrā-shən 

: the act or process of cooperating