un·​con·​scious | \ ˌən-ˈkän(t)-shəs How to pronounce unconscious (audio) \

Definition of unconscious

 (Entry 1 of 2)

1a : having lost consciousness was unconscious for three days
b(1) : not marked by conscious thought, sensation, or feeling unconscious motivation
(2) : of or relating to the unconscious
c : not possessing mind or consciousness unconscious matter
2a : not knowing or perceiving : not aware
b : free from self-awareness
3 : not consciously held or deliberately planned or carried out an unconscious bias



Definition of unconscious (Entry 2 of 2)

: the part of mental life that does not ordinarily enter the individual's awareness yet may influence behavior and perception or be revealed (as in slips of the tongue or in dreams)

Other Words from unconscious


unconsciously adverb
unconsciousness noun

Synonyms & Antonyms for unconscious

Synonyms: Adjective

Antonyms: Adjective

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Examples of unconscious in a Sentence

Adjective He was knocked unconscious by a fall. She was unconscious for three days after the accident.
Recent Examples on the Web: Adjective She was never knocked unconscious and even stood up after the crash. Jake Allen, The Indianapolis Star, 14 May 2022 The two were joined by Sandra Garza, the girlfriend of Capitol Police officer Brian Sicknick who was knocked unconscious during the attack and died the day after, and his mother, Gladys Sicknick. Bryan Schott, The Salt Lake Tribune, 21 Apr. 2022 One stuntman was knocked unconscious, needing to be rescued by divers. Peter Hartlaub, San Francisco Chronicle, 11 Apr. 2022 One woman was knocked unconscious, and six of the seven women suffered injuries including bruising and bleeding. Greg Hanlon, PEOPLE.com, 6 Apr. 2022 During the attacks, Steven Zajonc, 28, allegedly injured six victims, resulting in bleeding cuts and bruises to their faces, and one victim was knocked unconscious and treated for a concussion, prosecutors said. Alexandra Meeks, CNN, 5 Apr. 2022 Most of the victims sustained bruises and lacerations, Bragg said, and one was knocked unconscious and hospitalized. Dennis Romero, NBC News, 4 Apr. 2022 In the series, Kate instead gets into a horseback riding accident, falling from her horse after attempting a jump and being knocked unconscious for at least a week. Maureen Lee Lenker, EW.com, 26 Mar. 2022 In September 2018, two deputies were knocked unconscious at a department party at an event space called Kennedy Hall, the lawsuit says. Alene Tchekmedyianstaff Writer, Los Angeles Times, 24 Mar. 2022 See More

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'unconscious.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

First Known Use of unconscious


1712, in the meaning defined at sense 2a


circa 1912, in the meaning defined above

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Time Traveler for unconscious

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The first known use of unconscious was in 1712

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Last Updated

23 May 2022

Cite this Entry

“Unconscious.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/unconscious. Accessed 27 May. 2022.

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More Definitions for unconscious


un·​con·​scious | \ ˌən-ˈkän-shəs How to pronounce unconscious (audio) \

Kids Definition of unconscious

1 : not aware He was unconscious of being watched.
2 : having lost consciousness I was knocked unconscious by the fall.
3 : not intentional or planned an unconscious error

Other Words from unconscious

unconsciously adverb She unconsciously tightened her grip.


un·​con·​scious | \ ˌən-ˈkän-chəs How to pronounce unconscious (audio) \

Medical Definition of unconscious

 (Entry 1 of 2)

1 : not marked by conscious thought, sensation, or feeling unconscious motivation
2 : of or relating to the unconscious
3 : having lost consciousness was unconscious for three days

Other Words from unconscious

unconsciously adverb
unconsciousness noun



Medical Definition of unconscious (Entry 2 of 2)

: the part of mental life that is not ordinarily integrated or available to consciousness yet may be manifested as a motive force in overt behavior (as in neurosis) and is often revealed (as through dreams, slips of the tongue, or dissociated acts) — compare subconscious

More from Merriam-Webster on unconscious

Nglish: Translation of unconscious for Spanish Speakers

Britannica English: Translation of unconscious for Arabic Speakers

Britannica.com: Encyclopedia article about unconscious


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