Definitions

1. noun

A person who plays or competes with another as a member of the same team.

“The team’s new teammate quickly adapted to their role.”

2. noun

A person who works or collaborates with another in a particular field or activity.

“She was a skilled programmer and a valuable teammate in the startup.”

3. verb

To join or become a member of a team.

“The company will team-mate with a local charity to promote their cause.”