from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. One who cooperates; an associate.

from the GNU version of the Collaborative International Dictionary of English

  • n. One who labors jointly with others to promote the same end.

from The Century Dictionary and Cyclopedia

  • n. ⟨ LL. cooperator, ⟨ cooperari, pp. cooperatus, work together: see coöperate.] One who acts, labors, or strives in conjunction with another or others for the promotion of a common end; specifically, a member of a coöperative society.

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

  • n. an associate in an activity or endeavor or sphere of common interest


from Wiktionary, Creative Commons Attribution/Share-Alike License

co- +‎ operator


  • One of the main Arab American organizations in the country said that the word cooperator (ph) is a very negative connotation of the Arabic language, that it suggests something more akin to collaborator, someone whose siphoned out, and this is likely to hinder cooperation among Arab Americans in the program.

    CNN Transcript Nov 30, 2001

  • Fish and Wildlife Service agreed not to oppose the highway -- in fact, to be a "willing cooperator" with the Indiana Department of Transportation.

    Carol Polsgrove: A Big Road Through a Little Refuge: I-69 Threatens Endangered Species

  • Mr. Slaine, after he was approached by the Federal Bureau of Investigation in July 2007, became a key cooperator in gathering evidence for the government in a much broader insider-trading probe.

    No Jail Time for Cooperating Trader

  • I selected green to be a cooperator that had previously been a defector, and yellow vice versa.


  • We have someone offering help at a cost to himself—life and limb in the case of Autrey—who is a cooperator.


  • There was also the cooperator who when confronted with a defector responded with punishment.


  • A molecule can be the right shape or chemical makeup to speed up a useful chemical reaction (a “cooperator”) or could be the right constitution to disrupt it or divert cellular resources (a “defector”) because it snips other crucial participants into pieces.


  • Corina calls this effect “divine Tit for Tat”—if you are cooperator, you find yourself surrounded with cooperators and vice versa.


  • A cooperator pays a cost for another individual to receive a benefit.


  • But in those societies where the rule of law is perceived to be ineffective—that is, if criminal acts frequently go unpunished—antisocial “revenge” punishment thrives where a defector punishes a cooperator.



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