/ Dictionary / Index S stupefacient: Meaning and Definition of Find definitions for: stu•pe•fa•cient Pronunciation: (st"pu-fā'shunt, sty"-), [key] — adj. stupefying; producing stupor. —n. a drug or agent that produces stupor. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. stupe stupefaction Related Content Daily Word Quiz: paradox Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language