/ Dictionary / Index T teach-in: Meaning and Definition of Find definitions for: teach-in Pronunciation: (tēch'in"), [key] — pl. teach-ins. a prolonged period of lectures, speeches, etc., conducted without interruption by members of the faculty and invited guests at a college or university as a technique of social protest. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: teach-in (Thesaurus) teacher's pet teaching Related Content Daily Word Quiz: frugal Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language