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

Moby Thesaurus II by Grady Ward, 1.0:

40 Moby Thesaurus words for "tutor":
   Privatdocent, Privatdozent, advise, assistant, assistant professor,
   associate, associate professor, coach, coacher, cram,
   cram with facts, crammer, direct, drill, educate, educator,
   emeritus, enlighten, ground, guide, guru, indoctrinate, instruct,
   instructor, lecturer, mentor, prepare, prime, private instructor,
   professor, professor emeritus, reader, retired professor, school,
   stuff with knowledge, teach, teacher, train, tutorer,
   visiting professor



The Free On-line Dictionary of Computing (30 December 2018):

TUTOR

   A Scripting language on PLATO systems from CDC.

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


Bouvier's Law Dictionary, Revised 6th Ed (1856):

TUTOR, civil law. A person who has been lawfully appointed to the care of
the person and property of a minor.
     2. By the laws of Louisiana minors under the age of fourteen years, if
males, and under the age of twelve years, if females, are both, as to their
persons and their estates, placed under the authority of a tutor. Civ. Code,
art. 263. Above that age, and until their, majority or emancipation, they
are placed under the authority of a curator. Ibid.