warden

noun

1. a person charged with the care or custody of persons, animals, or things; keeper.
2. the chief administrative officer in charge of a prison.
3. any of various public officials charged with superintendence, as over a port or wildlife.
4. air-raid warden.
5. firewarden.
6. (in Connecticut) the chief executive officer of a borough.
7. (formerly) the principal official in a region, town, etc.
8. British.
   1. (initial capital letter)a traditional title of the president or governor of certain schools and colleges: Warden of Merton College.
   2. a member of a livery company of the City of London.
9. Canadian. the head of certain county or local councils.
10. a member of the governing body of a guild.
11. a churchwarden.
12. a gatekeeper.