One who instructs; a teacher.

plural of instructor

(US) The generic term for the principal instructor of fresh military recruits undergoing basic training in the various branches of the United States military, routinely abbreviated to the initialism DI; always filled by enlisted personnel (a sergeant or petty officer).

plural of drill instructor

The office of an instructor / the term of this office

plural of instructorship

(rare) Characteristic of an instructor; didactic.

plural of instructoress

Alternative form of instructress

Of or relating to instruction; instructive; educational.