/ Dictionary / Index A acausal: Meaning and Definition of Find definitions for: a•caus•al Pronunciation: (ā-kô'zul), [key] — adj. having no cause. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. acaulescent acc. Related Content Daily Word Quiz: soporific Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language