Breadcrumb Home > Dictionary > Index N narcosis: Meaning and Definition of Find definitions for: nar•co•sis Pronunciation: (när-kō'sis), [key] — n. a state of stupor or drowsiness. a state of stupor or greatly reduced activity produced by a drug. Cf.Also called Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: narcosis (Thesaurus) narcose narcosynthesis ✖ Related Content Daily Word Quiz: legerdemain Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language