(noun) the practice of cooperating; “economic cooperation”; “they agreed on a policy of cooperation”
(noun) joint operation or action; “their cooperation with us was essential for the success of our mission”
Source: WordNet® 3.1
cooperation (countable and uncountable, plural cooperations)
(usually, uncountable) The act of cooperating.
Active help from a person, organization, etc, such as an orderly sharing of space or resources.
Association for mutual benefit, such as for purposes of production or purchase.
Co*öp`er*a"tion, n. Etym: [L. coöperatio: cf. F. coopération.]
1. The act of coöperating, or of operating together to one end; joint
operation; concurrent effort or labor.
Not holpen by the coöperation of angels. Bacon.
2. (Polit. Econ.)
Definition: The association of a number of persons for their benefit.
Source: Webster’s Unabridged Dictionary 1913 Edition