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  1. Pathology. a deep, unnatural sleep; lethargy.
  2. Often sopors. Slang. methaqualone.
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Origin of sopor

1650–60; 1970–75 for def 2; < Latin
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for sopor

Historical Examples

  • The convex presupposes the concave; and vam is related to vap (as somnus is related to hpnos, to svapnas, and to sopor).

    Zoological Mythology (Volume II)

    Angelo de Gubernatis

British Dictionary definitions for sopor


  1. an abnormally deep sleep; stupor
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Word Origin

C17: from Latin: a deep sleep, death; related to somnus sleep
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

Word Origin and History for sopor


Latin, "deep sleep, lethargy," from PIE *swep-os-, suffixed form of root *swep- (1) "to sleep" (see Somnus).

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Online Etymology Dictionary, © 2010 Douglas Harper

sopor in Medicine


(sōpər, -pôr′)
  1. A deep, lethargic, or unnatural sleep.
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The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.