cooperation-n; 2 Senses

Sense Number 1: a joint operation

Commentary: COOPERATION[+event] A specific action or operation involving more than one entity.

Thanks for your cooperation in this matter.
Their cooperation with us was essential for the success of the mission.
The cooperation of Dyna-Corp and Intelli-Corp produced a revolutionary software system.

WordNet 2.0 Sense Numbers: 1

Sense Number 2: the practice of working together

Commentary: A long-term policy or general concept.

The two nations agreed on a policy of cooperation.
It's important that children learn cooperation.
Economic cooperation, not isolation, is the way of the future.
On the basketball court, our teamwork and cooperation were the keys to our success.

WordNet 2.0 Sense Numbers: 2