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

Greenberg says the team has the trust and cooperation of the real people involved. — Naman Ramachandran, Variety, 7 Nov. 2026

Syria signed a defense cooperation agreement with Saudi Arabia, and Riyadh provided $403 million in concessional loans for reconstruction projects in Syria this week. — Damian Zane, semafor.com, 6 Nov. 2026

Moving the needle forward will require greater cooperation, greater investment and broader adoption of technology, observers agree. — Martino Carrera, Footwear News, 6 Nov. 2026

Barnes denied any cooperation violating state law and said ICE agents are legally allowed to be in public areas of the jails. — Mona Darwish, Oc Register, 6 Nov. 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