a person charged with the care or custody of persons, animals, or things; keeper.

the chief administrative officer in charge of a prison.

any of various public officials charged with superintendence, as over a port or wildlife.

air-raid warden.

fire warden.

(in Connecticut) the chief executive officer of a borough.

(formerly) the principal official in a region, town, etc.

British .

( initial capital letter ) a traditional title of the president or governor of certain schools and colleges

Warden of Merton College.

a member of a livery company of the City of London.

Canadian . the head of certain county or local councils.

a member of the governing body of a guild.

a churchwarden.

a gatekeeper.