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

Mizusawa argues federal, state, and local governments should cooperate in enforcing immigration laws and has criticized efforts to limit cooperation between local authorities and federal immigration officials. — Amy Delaura, The Washington Examiner, 19 Sep. 2026

The ongoing conflict that has driven people from their homes in Iran as well as an internet shutdown and a lack of full cooperation from the two governments partially impeded the team's efforts to get information. — Arkansas Online, 18 Sep. 2026

The party has always ruled out any cooperation with the far-right — refusing to consider entering into a coalition government with the AfD or using votes from its lawmakers to get legislation passed. — Anna Noryskiewicz, CBS News, 18 Sep. 2026

Individual business success often depends on the strategy and tactics employed by the business community as a whole, in or outside the cooperation of the government, in response to changing trade conditions. — Radu Magdin, Forbes.com, 18 Sep. 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