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

When trust erodes, preventative care, cooperation and psychological well-being decline-leading to worse health outcomes across the population. —Dr. Howard A. Selinger, Hartford Courant, 31 Mar. 2026

Cognitive flexibility, opportunistic survival, and social cooperation have allowed rats to thrive in conditions that wipe out other species. —Jason Bittel, Big Think, 31 Mar. 2026

Vietnamese Prime Minister Pham Minh Chinh’s March 23 visit to Russia included agreements on oil and gas cooperation, alongside nuclear energy, as rising diesel prices begin to squeeze Vietnam’s manufacturing sector. —Anton L. Delgado, Los Angeles Times, 31 Mar. 2026

For residents, the town does monthly food drives in cooperation with Farm Share, family and holiday events in Oglesby Park and Town Hall and giveaways of Christmas gifts, school supplies, bicycles and turkeys. —Sun Sentinel Editorial Board, Sun Sentinel, 31 Mar. 2026

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