/ Dictionary / Index N nubilous: Meaning and Definition of Find definitions for: nu•bi•lous Pronunciation: (n'bu-lus, ny'-), [key] — adj. cloudy or foggy. obscure or vague; indefinite. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. nubile nucellus Related Content Daily Word Quiz: careening Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language