• synonyms


[sem-ee-kon-shuh s, sem-ahy-]
  1. half-conscious; not fully conscious.
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Origin of semiconscious

First recorded in 1830–40; semi- + conscious
Related formssem·i·con·scious·ly, adverbsem·i·con·scious·ness, noun
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for semiconscious

Contemporary Examples

Historical Examples

  • There was some of that semiconscious gentleness of perfect success about him.

  • 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.

  • When I was summoned to see Mr. Morowitch I found him in a semiconscious state and scarcely breathing.

    The Silent Bullet

    Arthur B. Reeve

British Dictionary definitions for semiconscious


  1. not fully conscious
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Derived Formssemiconsciously, adverbsemiconsciousness, 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

Word Origin and History for semiconscious


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

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Online Etymology Dictionary, © 2010 Douglas Harper

semiconscious in Medicine


(sĕm′ē-kŏnshəs, sĕm′ī-)
  1. Not completely aware of sensations; partially conscious.
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The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.