Collaborative (adjective)

1. Involving two or more people working together.
2. Characterized by a willingness to cooperate with others.

Origin:

From latin collaborare, from col- "together" + laborare "to work".

Examples:

1. The project was a collaborative effort by the entire team.
2. The class was designed to be a collaborative learning environment.
3. The book was a collaborative effort by several authors.
4. The company culture is a collaborative one.
5. The group was a collaborative of artists working together.