PRECIPITOUS Meaning of PRECIPITOUS in English adj. 1 a of or like a precipice. b dangerously steep. 2 = PRECIPITATE adj. precipitously adv. precipitousness n.[ obs. F précipiteux f. L praeceps (as PRECIPITATE) ] Concise Oxford English dictionary. Краткий оксфордский словарь английского языка. 2012