/ Dictionary / Index T teacher: Meaning and Definition of Find definitions for: teach•er Pronunciation: (tē'chur), [key] — n. a person who teaches or instructs, esp. as a profession; instructor. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: teacher (Thesaurus) teachable teacherage Related Content Daily Word Quiz: cautious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language