/ Dictionary / Index T tectonism: Meaning and Definition of Find definitions for: tec•to•nism Pronunciation: (tek'tu-niz"um), [key] — n. Geol. diastrophism (def. 1). Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. tectonics tectosilicate Related Content Daily Word Quiz: fervor Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language