Webster's Revised Unabridged Dictionary · 1913

Tutor

Tutor , noun

[Old English tutour, Latin tutor, from tueri to watch, defend: compare French tuteur. Compare Tuition.]

One who guards, protects, watches over, or has the care of, some person or thing.
(a)
A treasurer; a keeper.
Tutour of your treasure. — Piers Plowman
(b)
(Civ. Law) One who has the charge of a child or pupil and his estate; a guardian.
(c)
A private or public teacher.
(d)
(Eng. Universities) An officer or member of some hall, who instructs students, and is responsible for their discipline.
(e)
(Am. Colleges) An instructor of a lower rank than a professor.

Tutor , transitive verb

1.
To have the guardianship or care of; to teach; to instruct.
Their sons are well tutored by you. — Shakespeare
2.
To play the tutor toward; to treat with authority or severity. — Addison