/ Dictionary / Index N nebulosus: Meaning and Definition of Find definitions for: neb•u•lo•sus Pronunciation: (neb"yu-lō'sus), [key] — adj. Meteorol. (of a cloud) having indistinct details. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. nebulosity nebulous Related Content Daily Word Quiz: philtrum Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language