/ Dictionary / Index P precipitous: Meaning and Definition of Find definitions for: pre•cip•i•tous Pronunciation: (pri-sip'i-tus), [key] — adj. of the nature of or characterized by precipices: a precipitous wall of rock. extremely or impassably steep: precipitous mountain trails. precipitate. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: precipitous (Thesaurus) precipitinogen précis Related Content Daily Word Quiz: immense Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language