/ Dictionary / Index D disaster: Meaning and Definition of Find definitions for: dis•as•ter Pronunciation: (di-zas'tur, -zä'stur), [key] — n. a calamitous event, esp. one occurring suddenly and causing great loss of life, damage, or hardship, as a flood, airplane crash, or business failure. an unfavorable aspect of a star or planet. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: disaster (Thesaurus) disassortative mating disaster area Related Content Daily Word Quiz: perspicacious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language