/ Dictionary / Index N noxious: Meaning and Definition of Find definitions for: nox•ious Pronunciation: (nok'shus), [key] — adj. harmful or injurious to health or physical well-being: noxious fumes. morally harmful; corrupting; pernicious: a noxious plan to spread dissension. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: noxious (Thesaurus) nowy noyade Related Content Daily Word Quiz: ounterfeit Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language