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.
JPMorgan has said Rana didn’t cooperate with the probe.
From The Wall Street Journal • May 6, 2026
It likely also needs interest-rate hikes and lower oil prices to cooperate, according to market analysts.
From MarketWatch • May 2, 2026
Did Zambada — one-time keeper of many cartel secrets — cooperate with U.S. authorities?
From Los Angeles Times • Apr. 30, 2026
Some police leaders feel that they are in an impossible position: Whether or not they cooperate with the agency, their relationships with their communities have been compromised.
From Slate • Apr. 27, 2026
As lions became deadlier, so gazelles evolved to run faster, hyenas to cooperate better, and rhinoceroses to be more bad-tempered.
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.
