/ Dictionary / Index T triliteralism: Meaning and Definition of Find definitions for: tri•lit•er•al•ism Pronunciation: (trī-lit'ur-u-liz"um), [key] — n. the characteristic presence of triliteral roots in a language, as in the Semitic languages. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. triliteral trilithon Related Content Daily Word Quiz: philtrum Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language