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

The move comes just days after Maxwell’s attorneys submitted a list of demands in exchange for her cooperation, including congressional immunity, an advance look at questions, and a relocation of the interview outside of prison. —Kaelan Deese, The Washington Examiner, 1 Aug. 2025

Johnson-Carson, 24, pleaded guilty that same month to misdemeanor battery in exchange for his cooperation and testimony. —Chris Ramirez, jsonline.com, 1 Aug. 2025

As Russia has become increasingly reliant on China for its energy exports and imports of key technology amid Western sanctions, Roscosmos has started cooperation with China on its prospective lunar mission. —Vladimir Isachenkov, Chicago Tribune, 1 Aug. 2025

Additionally, Davis claimed that his past cooperation during interviews in 1998 and 1999 by federal prosecutors was under conditions of immunity per ABC. —Demicia Inman, VIBE.com, 31 July 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