[ som-nuh-luhnt ]
/ ˈsɒm nə lənt /


sleepy; drowsy.
tending to cause sleep.

Nearby words

  1. somnific,
  2. somniloquy,
  3. somnipathy,
  4. somnocinematography,
  5. somnolence,
  6. somnolently,
  7. somnolescent,
  8. somnus,
  9. somogyi effect,
  10. somogyi unit

Origin of somnolent

1425–75; late Middle English sompnolent < Old French < Latin somnolentus, derivative of somnus sleep; see -ulent

Related forms Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for somnolent

British Dictionary definitions for somnolent


/ (ˈsɒmnələnt) /


drowsy; sleepy
causing drowsiness
Derived Formssomnolence or somnolency, nounsomnolently, adverb

Word Origin for somnolent

C15: from Latin 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 somnolent



mid-15c., sompnolent, from Old French sompnolent (Modern French somnolent) or directly from Latin somnolentus "sleepy, drowsy," from somnus "sleep" (see Somnus). Respelled 17c. on Latin model.

Online Etymology Dictionary, © 2010 Douglas Harper

Medicine definitions for somnolent


[ sŏmnə-lənt ]


Drowsy; sleepy.
Inducing or tending to induce sleep; soporific.
In a condition of incomplete sleep; semicomatose.

The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.