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

Meanwhile, Bangladesh has mulled the idea of forming a trilateral hydro-cooperation with China and Pakistan – two of India’s biggest rivals. —Pintu Kumar Mahla, The Conversation, 3 Nov. 2025

The new season of Sesame Street focuses on helping young kids build emotional skills like kindness, cooperation, and listening. —Sarah Scott, Parents, 3 Nov. 2025

Diaz received just over six years in prison after pleading guilty to distributing painkillers and obstructing justice in a cooperation deal that also required his testimony at Carpman’s trial. —Jay Weaver, Miami Herald, 3 Nov. 2025

At their bilateral summit, Lee and Xi were both positive about their countries' relations, reaffirming their commitment to continued, stable economic cooperation. —Se Eun Gong, NPR, 2 Nov. 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