As a noun supervisor is
(management) a person with the official task of overseeing the work of a person or group.
Not English Chiefsupervisor has no English definition. It may be misspelled.
* supervisour (obsolete)
(management) A person with the official task of overseeing the work of a person or group.
A person who monitors someone to make sure they comply with rules or other requirements set for them.
(US) In certain states, an elected member of the governing body for a county which is called the board of supervisors.
* on-call supervisor.