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 summit produced no major breakthroughs, but some experts say the steps toward greater cooperation were still considered important, allowing the two powers to set up working groups that could prevent problems from escalating. — ABC News, 26 Sep. 2026

Because of low levels of trust, cooperation between the two superpowers remains limited, said George Chen, chair of digital practice at The Asia Group consultancy. — John Liu, CNN Money, 26 Sep. 2026

Zambia objected to provisions covering the use of health data and also resisted Washington’s effort to link the health agreement to cooperation on critical minerals. — Yinka Adegoke, semafor.com, 25 Sep. 2026

Beijing has instead rendered aid and supported the Iranian regime under the table with black market oil refineries, intelligence sharing, and cooperation on technologies. — Timothy Nerozzi, The Washington Examiner, 25 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