1. [noun] (management) A person whose job is to manage something, such as a business, a restaurant, or a sports team.
2. [noun] (baseball) The head coach.
3. [noun] (music) An administrator, for a singer or group.
4. [noun] (computer software) A window or application whose purpose is to give the user the control over some aspect of the software.
5. [noun] Someone who controls resources and expenditures.
6. [noun] (sports) someone in charge of training an athlete or a team.
