unconscious
Americanadjective
-
not conscious; without awareness, sensation, or cognition.
-
temporarily devoid of consciousness.
-
not perceived at the level of awareness; occurring below the level of conscious thought.
an unconscious impulse.
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not consciously realized, planned, or done; without conscious volition or intent.
an unconscious social slight.
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not endowed with mental faculties.
the unconscious stones.
noun
adjective
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lacking normal sensory awareness of the environment; insensible
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not aware of one's actions, behaviour, etc
unconscious of his bad manners
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characterized by lack of awareness or intention
an unconscious blunder
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coming from or produced by the unconscious
unconscious resentment
noun
Other Word Forms
Etymology
Origin of unconscious
First recorded in 1705–15; 1915–20 unconscious for def. 6; un- 1 + conscious
Explanation
When you're unconscious you're passed out or asleep. Anything going on in the body that we're not aware of can also be called unconscious. Being unconscious can be very nice, especially when you're in the middle of a deep sleep. But if you're unconscious because you fainted or got hit in the head, that's not so good. Unconscious people aren't aware of what's going on, and they can't talk or do things — except maybe for sleepwalking and sleeptalking. There are also unconscious thoughts and desires: things going on in the mind that you don't know about.
Vocabulary lists containing unconscious
Latin Love, Vol I: sci
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Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
The department was unable to confirm whether the person was in fact unconscious when they arrived at the scene or whether the person lost consciousness on the roller coaster.
From Los Angeles Times ● Aug. 14, 2026
Yet our unconscious minds know the end is coming.
From MarketWatch ● Aug. 13, 2026
McConnell was hospitalized in mid-June after being found unconscious in his D.C. home.
From Salon ● Aug. 6, 2026
The crew members of one aircraft were rescued alive, while the second crew were recovered unconscious and later pronounced dead.
From BBC ● Aug. 2, 2026
That does not mean that there were no reasons, only that they were unconscious ones.
From "History of Art, Volume 1" by H.W. Janson
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Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.