/ Dictionary / Index N naproxen: Meaning and Definition of Find definitions for: na•prox•en Pronunciation: (nu-prok'sun), [key] — n. Pharm. a nonsteroidal anti-inflammatory substance, CHO, used chiefly in the management of certain types of arthritis and as a painkiller. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: naproxen (Thesaurus) naprapathy Nara Related Content Daily Word Quiz: soporific Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language