The Collaborative International Dictionary of English v.0.48:

Tutor \Tu"tor\, v. t. [imp. & p. p. Tutored; p. pr. & vb. n.
   Tutoring.]
   1. To have the guardianship or care of; to teach; to
      instruct.
      [1913 Webster]

            Their sons are well tutored by you.   --Shak.
      [1913 Webster]

   2. To play the tutor toward; to treat with authority or
      severity. --Addison.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Tutor \Tu"tor\, n. [OE. tutour, L. tutor, fr. tueri to watch,
   defend: cf. F. tuteur. Cf. Tuition.]
   One who guards, protects, watches over, or has the care of,
   some person or thing. Specifically:
   [1913 Webster]
   (a) A treasurer; a keeper. "Tutour of your treasure." --Piers
       Plowman.
       [1913 Webster]
   (b) (Civ. Law) One who has the charge of a child or pupil and
       his estate; a guardian.
       [1913 Webster]
   (c) A private or public teacher.
       [1913 Webster]
   (d) (Eng. Universities) An officer or member of some hall,
       who instructs students, and is responsible for their
       discipline.
       [1913 Webster]
   (e) (Am. Colleges) An instructor of a lower rank than a
       professor.
       [1913 Webster]

WordNet (r) 3.0 (2006):

tutor
    n 1: a person who gives private instruction (as in singing,
         acting, etc.) [syn: coach, private instructor, tutor]
    v 1: be a tutor to someone; give individual instruction; "She
         tutored me in Spanish"
    2: act as a guardian to someone

The Free On-line Dictionary of Computing (19 January 2023):

TUTOR

   A Scripting language on PLATO systems from CDC.

   ["The TUTOR Language", Bruce Sherwood, Control Data, 1977].