1.  cooperative(n = noun.act) co-op - a jointly owned commercial enterprise (usually organized by farmers or consumers) that produces and distributes goods and services and is run for the benefit of its owners;
is a kind of commercial enterprise

2.  cooperative(n = noun.group) - an association formed and operated for the benefit of those using it;
is a kind of association

1.  cooperative(s = adj.all) concerted, conjunct, conjunctive - involving the joint activity of two or more; "concerted action"; "the conjunct influence of fire and strong wind"; "the conjunctive focus of political opposition"; "a cooperative effort"; "a united effort"; "joint military activities"
Derived form verb cooperate₁

2.  cooperative(a = adj.all) - done with or working with others for a common purpose or benefit; "a cooperative effort"
Antonym: uncooperative
Derived forms verb cooperate₁, noun cooperativeness₁

3.  cooperative(s = adj.all) accommodative - willing to adjust to differences in order to obtain agreement;
Derived form noun cooperativeness₁

cooperative, adj. & n. (also co-operative)
--adj.
1 of or affording cooperation.
2 willing to cooperate.
3 Econ. (of a farm, shop, or other business, or a society owning such businesses) owned and run jointly by its members, with profits shared among them.
--n. a cooperative farm or society or business.

Derivative:
cooperatively adv. cooperativeness n.

Etymology:
LL cooperativus (as COOPERATE)

N  cooperation, coadjuvancy, coadjutancy, coagency, coefficiency, concert, concurrence, complicity, participation, union, additivity, combination, collusion, association, alliance, colleagueship, joint stock, copartnership, cartel, confederation, coalition, fusion, a long pull a strong pull and a pull all together, logrolling, freemasonry, unanimity, esprit de corps, party spirit, clanship, partisanship, concord, synergy, coaction, cooperating, in cooperation, in league, coadjuvant, coadjutant, dyed in the wool, cooperative, additive, participative, coactive, synergetic, synergistic, favorable to, unopposed, as one, shoulder to shoulder, synergistically, cooperatively, due teste valgono piu che una sola.