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

• affiliation
• alliance
• association
• collaboration
• confederation
• connection
• hookup
• liaison
• linkup
• partnership
• relation
• relationship
• tie-up
• union

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

Three out of 4 support denying federal funds to sanctuary cities that limit their cooperation with immigration authorities; nearly as many back using the U.S. military to arrest and detain immigrants without legal status. —Joel Rose, NPR, 14 Feb. 2025

The Trump administration has also sued Chicago and the states of Illinois and New York over laws limiting local police cooperation with immigration raids. —Trevor Hughes, USA TODAY, 13 Feb. 2025

Attorney General Pam Bondi announced Wednesday that the Justice Department is suing New York state officials, including Gov. Kathy Hochul, for policies that allegedly limit cooperation with immigration authorities. —Sareen Habeshian, Axios, 13 Feb. 2025

Bullet Train Explosion is directed by Attack on Titan and Shin Godzilla filmmaker Shinji Higuchi and has been made in cooperation with the East Japan Railway Company, meaning real bullet trains were used during the production. —Abid Rahman, The Hollywood Reporter, 13 Feb. 2025

Word History

Etymology

see cooperate

First Known Use

15th century, in the meaning defined at sense 1

Kids Definition

cooperation

noun

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

: the act or process of cooperating