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

The pact, set up earlier this year, is meant to coordinate defense and security cooperation among the three. — Mostafa Salem, CNN Money, 10 Oct. 2026

Under a strategic cooperation agreement announced October 8, the companies will jointly develop and test embodied AI robot applications for factory logistics and build demonstration sites to evaluate their use in real production environments. — Jijo Malayil, Interesting Engineering, 9 Oct. 2026

Arab-Israeli cooperation was impressive, but deeper diplomatic ties might have prevented the Omani co-pilot from being behind the controls. — Editorial Board, Washington Post, 9 Oct. 2026

The Democrat, who took office in January, has restricted local cooperation with immigration enforcement operations and repeatedly called for the abolition of ICE. — Rebecca Santana, Los Angeles Times, 9 Oct. 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