tutor

American Heritage® Dictionary of the English Language, Fourth Edition

1. n. A private instructor.
2. n. One that gives additional, special, or remedial instruction.
3. n. A teacher or teaching assistant in some universities and colleges having a rank lower than that of an instructor.
4. n. A graduate, usually a fellow, responsible for the supervision of an undergraduate at some British universities.
5. n. Law The legal guardian of a minor and of the minor's property.
6. v. To act as a tutor to; instruct or teach privately.
7. v. To have the guardianship, tutelage, or care of.
8. v. To function as a tutor.
9. v. To be instructed by a tutor; study under a tutor.

Century Dictionary and Cyclopedia

1. n. A guardian.
2. n. In law, the guardian of a boy or girl in pupilarity. In the absence of other provision, the father is the tutor, and failing him there may be a tutor nominate, a tutor-at-law, or a tutor dative. A tutor nominate is one nominated in a testament, etc., by the father of the child or children to be placed under guardianship. A father may nominate any number of tutors. A tutor-at-law is one who acquires his right by the mere disposition of law, in cases where there is no tutor nominate, or where the tutor nominate is dead, or cannot act, or has not accepted. A tutor dative is one named by the sovereign on the failure of both tutors nominate and tutors-at-law. In civil law it was originally considered as a right of the nearest relative to be named the tutor in order to preserve the fortune for the family, and it was only gradually that the protection of the infant himself came to be considered the principal object, and the filling of the office of tutor more as a duty which had to be fulfilled unless there were special circumstances to excuse, than as a right which a relative could claim.
3. n. One who has the care of instructing another in various branches or in any branch of learning; a private instructor; also, a teacher or instructor in anything.
4. n. In Eng. universities, an officer who is specially intrusted with the care of the undergraduates of his college.
5. n. In U. S. colleges, a teacher subordinate to a professor, usually appointed for a year or a term of years.
6. To have the guardianship or care of.
7. To instruct; teach.

Wiktionary

1. n. One who teaches another (usually called a student, learner, or tutee) in a one-on-one or small-group interaction.
2. v. transitive To instruct or teach, especially to an individual or small group.

GNU Webster's 1913

1. n. One who guards, protects, watches over, or has the care of, some person or thing.
2. n. A treasurer; a keeper.
3. n. (Civ. Law) One who has the charge of a child or pupil and his estate; a guardian.
4. n. A private or public teacher.
5. n. (Eng. Universities) An officer or member of some hall, who instructs students, and is responsible for their discipline.
6. n. (Am. Colleges) An instructor of a lower rank than a professor.
7. v. To have the guardianship or care of; to teach; to instruct.
8. v. To play the tutor toward; to treat with authority or severity.

WordNet 3.0

1. n. a person who gives private instruction (as in singing, acting, etc.)
2. v. act as a guardian to someone
3. v. be a tutor to someone; give individual instruction