mid-15c., from Old French instructeur (14c.) and directly from Medieval Latin instructor "teacher" (in classical Latin, "preparer"), agent noun from instruere "arrange; inform, teach" (see instruct).
Entries linking to instructor
instruct v.
early 15c., "to tell, inform, impart knowledge or information," also "furnish with authoritative directions," from Latin instructus, past participle of instruere "arrange, prepare, set in order; inform, teach," literally "to build, erect," from in- "on" (from PIE root *en "in") + struere "to pile, build" (from PIE *streu-, extended form of root *stere- "to spread"). Related: Instructed; instructing.