/ Dictionary / Index T tridimensional: Meaning and Definition of Find definitions for: tri•di•men•sion•al Pronunciation: (trī"di-men'shu-nl, -dī-), [key] — adj. having three dimensions. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Tridentum triduum Related Content Daily Word Quiz: dissonant Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language