[ sop-uh-rif-ik, soh-puh- ]
/ ˌsɒp əˈrɪf ɪk, ˌsoʊ pə- /


causing or tending to cause sleep.
pertaining to or characterized by sleep or sleepiness; sleepy; drowsy.


something that causes sleep, as a medicine or drug.

Origin of soporific

1655–65; < Latin sopor sopor + -i- + -fic; compare French soporifique

Related forms

sop·o·rif·i·cal·ly, adverban·ti·sop·o·rif·ic, adjective, nounnon·sop·or·if·ic, adjective, nounun·sop·o·rif·ic, adjective Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for soporific

British Dictionary definitions for soporific


/ (ˌsɒpəˈrɪfɪk) /

adjective Also: archaic soporiferous

inducing sleep
drowsy; sleepy


a drug or other agent that induces sleep

Derived Forms

soporifically, adverb
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Medicine definitions for soporific


[ sŏp′ə-rĭfĭk, sō′pə- ]


Inducing or tending to induce sleep.
Sleepy; drowsy.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.