an act or instance of working or acting together for a common purpose or benefit; joint action.
2.
more or less active assistance from a person, organization, etc.: We sought the cooperation of various civic leaders.
3.
willingness to cooperate: to indicate cooperation.
4.
Economics. the combination of persons for purposes of production, purchase, or distribution for their joint benefit: producers' cooperation; consumers' cooperation.
5.
Sociology. activity shared for mutual benefit.
6.
Ecology. mutually beneficial interaction among organisms living in a limited area.
an arrangement of five objects, as trees, in a square or rectangle, one at each corner and one in the middle.
a children's mummer's parade, as on the Fourth of July, with prizes for the best costumes.
an extraordinary or unusual thing, person, or event; an exceptional example or instance.
a calculus or concretion found in the stomach or intestines of certain animals, esp. ruminants, formerly reputed to be an effective remedy for poison.
a printed punctuation mark (‽), available only in some typefaces, designed to combine the question mark (?) and the exclamation point (!), indicating a mixture of query and interjection, as after a rhetorical question.