1. a boss, employer,

2. a head of a group of people, a department, a location, etc.

3. a member of the upper classes who offered aid and protection to those lesser than them (historical, Ancient Rome)

4. a protector (obsolete)

5. a powerful or influential person who supports another's career through their support and approval (dated)

6. a pimp or brothel-keeper (prostitution)

7. a model or template

8. a pattern (sewing and knitting)

9. a stencil

10. a piece of wood from which an instrument is made (lutherie)