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 of cooperation

• 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

Despite signs of progress on building mechanisms to manage future relationships, the two countries are inevitably bound by an intensifying rivalry that limits how far their cooperation can go, Doshi said. —Anniek Bao, CNBC, 15 May 2026

Vendor Management Becomes More Important Employers deploying third-party technology will also need cooperation from vendors. —Alonzo Martinez, Forbes.com, 15 May 2026

So future agreements could involve cooler normalisation, selective security cooperation, quieter diplomacy and a slower expansion. —Chas Newkey-Burden, TheWeek, 15 May 2026

Ratcliffe met with Raúl Guillermo Rodríguez Castro, Interior Minister Lázaro Álvarez Casas and the head of Cuban intelligence services, and discussed intelligence cooperation, economic stability and security issues. —Andrea Rodriguez, Fortune, 15 May 2026

Word History

Etymology

see cooperate

First Known Use

15th century, in the meaning defined at sense 1

Rhymes for cooperation

• abdication
• aberration
• abjuration
• abnegation
• abrogation
• acceptation
• acclamation
• acclimation
• accusation
• activation
• actuation
• acylation

Kids Definition

cooperation

noun

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

: the act or process of cooperating