manager

noun

1. A person whose job is to manage something, such as a business, a restaurant, or a sports team.

   “Although they did not want to risk wasting money, faster-climbing managers did value generosity and fair-mindedness.”

   “And it was a fitting victory for Liverpool as Anfield celebrated the 100th anniversary of the birth of their legendary Scottish manager Bill Shankly.”

2. The head coach.
3. An administrator, for a singer or group.
4. A window or application whose purpose is to give the user the control over some aspect of the system.

   “a file manager; a task manager; Program Manager”