/ Dictionary / Index N nauseous: Meaning and Definition of Find definitions for: nau•seous Pronunciation: (nô'shus, -zē-us), [key] — adj. affected with nausea; nauseated: to feel nauseous. causing nausea; sickening; nauseating. disgusting; loathsome: a nauseous display of greed. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: nauseous (Thesaurus) nauseating naut. Related Content Daily Word Quiz: gregarious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language