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Synonyms

cooperation

American  
[koh-op-uh-rey-shuhn] / koʊˌɒp əˈreɪ ʃən /
Or co-operation

noun

  1. an act or instance of working or acting together for a common purpose or benefit; joint action.

  2. more or less active assistance from a person, organization, etc..

    We sought the cooperation of various civic leaders.

  3. willingness to cooperate.

    to indicate cooperation.

  4. Economics. the combination of persons for purposes of production, purchase, or distribution for their joint benefit.

    producers' cooperation; consumers' cooperation.

  5. Sociology. activity shared for mutual benefit.

  6. Ecology. mutually beneficial interaction among organisms living in a limited area.

cooperation British  
/ kəʊˌɒpəˈreɪʃən /

noun

  1. joint operation or action

  2. assistance or willingness to assist

  3. economics the combination of consumers, workers, farmers, etc, in activities usually embracing production, distribution, or trade

  4. ecology beneficial but inessential interaction between two species in a community

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Other Word Forms

  • co-operationist noun
  • cooperationist noun

Etymology

Origin of cooperation

First recorded in 1620–30; from Middle French, from Late Latin cooperātiōn-, stem of cooperātiō; equivalent to cooperate + -ion

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

Microsoft also said it would help train one million engineers and developers by 2030 in cooperation with Japanese companies.

From The Wall Street Journal • Apr. 3, 2026

In March 2025, Algonquin Power announced the extension of a cooperation agreement with the hedge fund along with the appointment of two new board directors including Gavin Molinelli, a senior partner at Starboard.

From Barron's • Apr. 2, 2026

Following a meeting with Japanese Prime Minister Sanae Takaichi in Tokyo Wednesday, Macron spoke of their cooperation in the face of the "current energy crisis".

From Barron's • Apr. 1, 2026

If all goes to plan, Hansen will become the first non-American to travel to the Moon – a milestone he sees as a sign of how far international cooperation in space has come since Apollo.

From BBC • Mar. 30, 2026

Social cooperation is our key for survival and reproduction.

From "Sapiens: A Brief History of Humankind" by Yuval Noah Harari

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.