Tutor, v. t. [imp. & p. p. Tutored; p. pr. & vb. n. Tutoring.]
1. To have the guardianship or care of; to teach; to instruct. Their sons are well tutored by you. Shak.
2. To play the tutor toward; to treat with authority or severity. Addison.
1 other Webster entry under this spelling
Tutor, n.
One who guards, protects, watches over, or has the care of, some person or thing. Specifically: -- (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.
Shades of meaning
Fernald has no entry of its own for tutor; he lists it under teach.
He lists it without comment; the entries above explain its neighbors.