cooperate
Americanverb (used without object)
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to work or act together or jointly for a common purpose or benefit.
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to work or act with another or other persons willingly and agreeably.
- Synonyms:
- participate, join, collaborate
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to practice economic cooperation.
verb
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to work or act together
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to be of assistance or be willing to assist
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economics (of firms, workers, consumers, etc) to engage in economic cooperation
Other Word Forms
Etymology
Origin of cooperate
First recorded in 1595–1605; from Late Latin cooperātus, past participle of cooperārī “to work with”; see co-, operate
Explanation
When you cooperate, you work together. You can cooperate with the police by telling them everything you know about your neighbor’s pet leopard, or your preschooler can cooperate with you by doing everything you tell him to do, now! The verb cooperate is originally from the combination of The Latin prefix co-, meaning “together,” and operari, meaning “to work.” The term “co-op” is a shortening of cooperative and is used when people work together (or cooperate) to run a preschool, health food store, or a residence. When you start or join a co-op, be prepared to cooperate with your partners, and remember: somebody has to clean the bathrooms.
Vocabulary lists containing cooperate
UCPS 6th Grade Roots List #1
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Divergent
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Chapter 28: The Cold War Era
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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.
She had refused to cooperate with federal investigators and pleaded not guilty, but recently discussed a plea deal with prosecutors.
From Los Angeles Times • May 13, 2026
If housing inflation doesn’t cooperate, it leaves officials without much hope that inflationary pressures can be tamed in the near-term.
From Barron's • May 11, 2026
During his stint as high representative, Paddy Ashdown memorably wielded these so-called "Bonn Powers" sacking 60 Bosnian-Serb officials in one day in 2004 for refusing to cooperate with the Hague Tribunal.
From BBC • May 11, 2026
Although there aren’t any other cooperative breeders among the great apes, there are South American treetop monkeys called marmosets and tamarins who do cooperate to raise young.
From Slate • May 10, 2026
Such myths give Sapiens the unprecedented ability to cooperate flexibly in large numbers.
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.
