(slang) Nickname for a teacher.

(informal, usually as a term of address) teacher

(ditransitive) To pass on knowledge to.

(intransitive, stative) To pass on knowledge generally, especially as one's profession; to act as a teacher.

(ditransitive) To cause (someone) to learn or understand (something).

(ditransitive) To cause to know the disagreeable consequences of some action.

(obsolete, transitive) To show (someone) the way; to guide, conduct; to point, indicate.