(1):

(n.) An instructor of a lower rank than a professor.

(2):

(v. t.) To have the guardianship or care of; to teach; to instruct.

(3):

(n.) A private or public teacher.

(4):

(n.) One who guards, protects, watches over, or has the care of, some person or thing.

(5):

(v. t.) To play the tutor toward; to treat with authority or severity.

(6):

(n.) An officer or member of some hall, who instructs students, and is responsible for their discipline.

(7):

(n.) One who has the charge of a child or pupil and his estate; a guardian.

(8):

(n.) A treasurer; a keeper.