/ Dictionary / Index C causal: Meaning and Definition of Find definitions for: caus•al Pronunciation: (kô'zul), [key] — adj. of, constituting, or implying a cause. expressing a cause, as the conjunctions because and since. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: causal (Thesaurus) caus. causalgia Related Content Daily Word Quiz: arid Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language