Co*op"er*ate (?), v. i. [imp. & p.p. Cooperated; p.pr. & vb.n. Cooperating.] [L. cooperatus, p.p. of cooperari to cooperate; co + operari to work, opus work. See Operate.]
To act or operate jointly with another or others; to concur in action, effort, or effect.
Whate'er cooperates to the common mirth.
Crashaw.
© Webster 1913.