D defs.my
Entry 2 senses Webster, 1913

Coöperation

· Co·öp·er·a·tion · IPA
01 n. The act of cooperating, or of operating together to one end; joint operation; concurrent effort or labor.
  1. 1.
    The act of cooperating, or of operating together to one end; joint operation; concurrent effort or labor.
    “Not holpen by the cooperation of angels.” Bacon.
  2. 2.
    The association of a number of persons for their benefit.(Polit. Econ.)