Definition of "cooperation" []

• The act or practice of cooperating. (noun)
• The association of persons or businesses for common, usually economic, benefit. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "When Tit-for-Tat is inoperative, anarchism can achieve mutual cooperation only if all agents always choose to act cooperatively even when its physically possible to defect and exploit others 'cooperation*."
• "We can only hope that Calderon can throw the cartels on the defensive, gain cooperation from a frightened public which is reluctant to trust police, and start controlling the drug kingpins -- whose organizations seem in the meantime to be decentralizing and squabbling over territory."
• "The word cooperation means to work together toward a common end or purpose; however, I found that some of the students acted as if their common purpose was to put an end to my work!"