/ Dictionary / Index N narco: Meaning and Definition of Find definitions for: nar•co Pronunciation: (när'kō), [key] — pl. -cos. narc. narco- Pronunciation: [key] a combining form meaning “stupor,” “narcosis,” used in the formation of compound words: narcodiagnosis. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. narcissus narcoanalysis Related Content Daily Word Quiz: lyceum Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language