from The Century Dictionary.

  • noun In psychology, the process by which a mental group, in the exercise of its apperceptive function, prompts other groups to a similar activity.
  • noun The act of working together to one end, or of combining for a certain purpose; joint operation or endeavor; concurrent effort or labor: as, the coöperation of several authors; the cooperation of the understanding and the will.
  • noun Specifically In polit. econ., a union of persons, especially of a number of laborers or small capitalists, for purposes of production, purchase, or distribution for their joint benefit; the act of uniting in, or the concurrent labor or action of, a coöperative society. See coöperative.

from the GNU version of the Collaborative International Dictionary of English.

  • noun The act of coöperating, or of operating together to one end; joint operation; concurrent effort or labor.
  • noun (Polit. Econ.) The association of a number of persons for their benefit.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • noun Alternative spelling of cooperation.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • noun joint operation or action
  • noun the practice of cooperating


Sorry, no etymologies found.


    Sorry, no example sentences found.


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  • An American restoration in foreign affairs will require a commitment not only to international coöperation but also to international institutions that can address global warming, the dislocations of what will likely be a deepening global economic crisis, disease epidemics, nuclear proliferation, terrorism, and other, more traditional security challenges.

    (The New Yorker, Comment: The choice, October 13, 2008)

    October 13, 2008

  • There is a certain logic to this style, which I seem to see only in venerable New York publications. After all, there's no doubt that the two vowels form part of different syllables, and it's nicer than "co-operation".

    October 13, 2008

  • When I first saw this I thought it had escaped from the Ikea list.

    October 13, 2008

  • "Coöperation" is a fair introduction to the diaresis, but discriminating users prefer "zoölogical."

    October 13, 2008