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[sem-ee-kon-shuh s, sem-ahy-] /ˌsɛm iˈkɒn ʃəs, ˌsɛm aɪ-/
half-conscious; not fully conscious.
Origin of semiconscious
First recorded in 1830-40; semi- + conscious
Related forms
semiconsciously, adverb
semiconsciousness, noun Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2018.
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Examples from the Web for semiconscious
Contemporary Examples
Historical Examples
  • There was some of that semiconscious gentleness of perfect success about him.

    'As Gold in the Furnace' John E. Copus
  • He knew no one, and did not speak, though he was semiconscious.

  • He no longer observed, no longer thought, and was but semiconscious.

    South Sea Tales Jack London
  • It caught Barney like a sack of sodden rags and flung him atop the dazed and semiconscious younger man.

    Make Mine Homogenized Rick Raphael
  • When I was summoned to see Mr. Morowitch I found him in a semiconscious state and scarcely breathing.

    The Silent Bullet Arthur B. Reeve
  • Slowly a luxurious sense of weariness overcame her and again she leaned back on her pillow and sank into a semiconscious sleep.

    The Place Beyond the Winds Harriet T. Comstock
  • Standing up was a delicate job, but he managed it, feeling rather proud of himself in a dim, semiconscious sort of way.

    Out Like a Light Gordon Randall Garrett
  • Might I ask whether in his semiconscious state he said anything that might at all serve as a clue?

    The Silent Bullet Arthur B. Reeve
  • Even in his semiconscious state Rick realized the danger and managed to shut his eyes.

    The Scarlet Lake Mystery Harold Leland Goodwin
British Dictionary definitions for semiconscious


not fully conscious
Derived Forms
semiconsciously, adverb
semiconsciousness, noun
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
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Word Origin and History for semiconscious

also semi-conscious, 1838, from semi- + conscious. Related: Semiconsciously; semiconsciousness.

Online Etymology Dictionary, © 2010 Douglas Harper
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semiconscious in Medicine

semiconscious sem·i·con·scious (sěm'ē-kŏn'shəs, sěm'ī-)
Not completely aware of sensations; partially conscious.

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