īnstrūctor ōris, m
instruo, a preparer : convivi.
instructor, ōris, m. [instruo], a preparer : convivii, Cic. post Red. in Sen. 6, 15. ...
A New Latin Dictionary by Charlton T. Lewis Ph.D. and Charles Short, LL. D.
·noun One who instructs; one who imparts knowledge to another; a teacher. ...
Webster's Dictionary of the English Language