\Co*["o]p"er*a*tive\, a.
Operating jointly to the same end.

{Co["o]perative society}, a society established on the
   principle of a joint-stock association, for the production
   of commodities, or their purchase and distribution for
   consumption, or for the borrowing and lending of capital
   among its members.

{Co["o]perative store}, a store established by a
   co["o]perative society, where the members make their
   purchases and share in the profits or losses.