Warden (noun)

1. A person who is in charge of a prison or jail.
2. A person responsible for overseeing a particular place, institution, or organization.

Origin:

Late middle english: from old french wardein, from warder "to guard".

Examples:

1. The warden of the prison was a strict but fair man.
2. The warden of the wildlife sanctuary had been working there for over 20 years.
3. The school warden had to supervise the students during their lunch hour.
4. The warden of the monastery was a kind and spiritual person.
5. The warden of the national park was responsible for enforcing the rules and protecting the wildlife.