/ Dictionary / Index S soporific: Meaning and Definition of Find definitions for: sop•o•rif•ic Pronunciation: (sop"u-rif'ik, sō"pu-), [key] — adj. causing or tending to cause sleep. pertaining to or characterized by sleep or sleepiness; sleepy; drowsy. —n. something that causes sleep, as a medicine or drug. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: soporific (Thesaurus) soporiferous soporose Related Content Daily Word Quiz: secular Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language