Tutor

noun
1.
a person employed to instruct another in some branch or branches of learning, especially a private instructor.
2.
a teacher of academic rank lower than instructor in some American universities and colleges.
3.
a teacher without institutional connection who assists students in preparing for examinations.
4.
(especially at Oxford and Cambridge) a university officer, usually a fellow, responsible for teaching and supervising a number of undergraduates.
5.
the guardian of a boy or girl below the age of puberty or majority.
verb (used with object)
6.
to act as a tutor to; teach or instruct, especially privately.
7.
to have the guardianship, instruction, or care of.
8.
to instruct underhandedly; coach:
to tutor a witness before he testifies.
9.
Archaic.

to train, school, or discipline.
to admonish or reprove.

verb (used without object)
10.
to act as a tutor or private instructor.
11.
to study privately with a tutor.
noun
1.
a teacher, usually instructing individual pupils and often engaged privately
2.
(at universities, colleges, etc) a member of staff responsible for the teaching and supervision of a certain number of students
3.
(Scots law) the guardian of a pupil See pupil1 (sense 2)
verb
4.
to act as a tutor to (someone); instruct
5.
(transitive) to act as guardian to; have care of
6.
(intransitive) (mainly US) to study under a tutor
7.
(transitive) (rare) to admonish, discipline, or reprimand

A Scripting language on PLATO systems from CDC.
[“The TUTOR Language”, Bruce Sherwood, Control Data, 1977].