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

• partnership
• collaboration
• association
• relationship
• affiliation

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

Maintaining positive ties with South Korea’s President Lee Jae Myung would continue the lattice-like foreign policy encouraged by Washington, one that favors multilateral cooperation among like-minded nations over bilateral dependence. —Hanako Montgomery, CNN Money, 27 Oct. 2025

Lavrov also met in Moscow with North Korean Foreign Minister Choe Son Hui, underscoring growing military cooperation between the two countries. —Gabe Whisnant, MSNBC Newsweek, 27 Oct. 2025

Other governments are signing nuclear cooperation agreements with Russia, China, and the United States. —W. Gyude Moore, semafor.com, 27 Oct. 2025

The film is produced by Eyeworks Film & TV Drama in co-production with Phanta Film, and in cooperation with Scio Productions and Kinepolis Film Distribution. —Leo Barraclough, Variety, 27 Oct. 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