warden

noun

• a person responsible for the supervision of a particular place or activity or for enforcing the regulations associated with it:the warden of a nature reserve an air-raid warden
• British the head of certain schools, colleges, or other institutions: the Warden of All Souls College, Oxford
• a prison officer: securely handcuffed to a warden, he was taken to Wandsworth Prison
• chiefly North American a prison governor.