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[koh-op-uh-reyt] /koʊˈɒp əˌreɪt/
verb (used without object), cooperated, cooperating.
to work or act together or jointly for a common purpose or benefit.
to work or act with another or other persons willingly and agreeably.
to practice economic cooperation.
Also, co-operate.
Origin of cooperate
1595-1605; < Late Latin cooperātus past participle of cooperārī to work with. See co-, operate
Related forms
cooperator, co-operator, noun
uncooperating, adjective
2. collaborate, join, participate. Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the web for cooperate
  • One defendant has died, and two have entered guilty pleas and agreed to cooperate with the authorities.
  • To say that our ancestors lived in a zero sum world is to say that they did not cooperate.
  • Few of our closest relatives, the great apes, cooperate with each other as extensively as meerkats.
  • Humans cooperate on all sorts of issues and tasks, but every so often a member of the group fails to pull his weight.
  • They're known to help individuals in distress, cooperate in rearing children and may even mourn their dead.
  • Single-celled protozoa had to cooperate to give rise to the first multicellular animals.
  • However, it's generally illegal to refuse to cooperate with flight attendants' instructions.
  • Elephants quickly learned to cooperate as a pair on a task that brought them a food reward.
  • You'll need a lot of friends who can be convinced to cooperate.
  • The field moves forward by virtue of the fact that people cooperate.
British Dictionary definitions for cooperate


verb (intransitive)
to work or act together
to be of assistance or be willing to assist
(economics) (of firms, workers, consumers, etc) to engage in economic cooperation
Derived Forms
cooperator, co-operator, noun
Word Origin
C17: from Late Latin cooperārī to work with, combine, from Latin operārī to work
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
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Word Origin and History for cooperate

also co-operate, c.1600, from Late Latin cooperatus, past participle of cooperari "to work together with" (see cooperation). Related: Cooperated; cooperating.

Online Etymology Dictionary, © 2010 Douglas Harper
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