[sem-ee-kon-shuh s, sem-ahy-]


half-conscious; not fully conscious.

Origin of semiconscious

First recorded in 1830–40; semi- + conscious
Related formssem·i·con·scious·ly, adverbsem·i·con·scious·ness, noun Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for semiconscious

Contemporary Examples of semiconscious

Historical Examples of semiconscious

  • 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



not fully conscious
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.

Online Etymology Dictionary, © 2010 Douglas Harper

semiconscious in Medicine


[sĕm′ē-kŏnshəs, sĕm′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.