1. in a way that involves working together with others toward a common goal
2. in a helpful and willing manner

Examples

• The students worked cooperatively on their science project.
• The two companies decided to develop the new technology cooperatively.
• She answered all the detective’s questions cooperatively.
• The neighbors cooperatively organized a block party.
• The children played cooperatively in the sandbox.
• Both countries agreed to share resources cooperatively during the crisis.