/ Dictionary / Index T three-dimensional: Meaning and Definition of Find definitions for: three-di•men•sion•al Pronunciation: (thrē'di-men'shu-nl, -dī-), [key] — adj. having, or seeming to have, the dimension of depth as well as width and height. (esp. in a literary work) fully developed: The story came alive chiefly because the characters were vividly three-dimensional. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: three-dimensional (Thesaurus) three-decker Three Fires Related Content Daily Word Quiz: jaundice Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language