/ Dictionary / Index F four-dimensional: Meaning and Definition of Find definitions for: four-di•men•sion•al Pronunciation: (fôr'di-men'shu-nl, fōr'-), [key] — adj. Math. of a space having points, or a set having elements, which require four coordinates for their unique determination. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: four-dimensional (Thesaurus) four-cycle Fourdrinier Related Content Daily Word Quiz: impetuous Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language