/ Dictionary / Index N nitrous: Meaning and Definition of Find definitions for: ni•trous Pronunciation: (nī'trus), [key] — adj. Chem. pertaining to compounds obtained from niter, usually containing less oxygen than the corresponding nitric compounds. containing nitrogen, usually in the trivalent state. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: nitrous (Thesaurus) nitrosylsulfuric acid nitrous acid Related Content Daily Word Quiz: vertigo Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language