Synonyms of unconsciousnext
1
a
: 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
2
a
: not knowing or perceiving : not aware
b
: free from self-awareness
3
: not consciously held or deliberately planned or carried out
an unconscious bias
unconsciously adverb
unconsciousness noun

unconscious

2 of 2

noun

: 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)

Synonyms of unconscious

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
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Adjective
The moped passenger, who police said was struck by the truck’s rear wheel, can be seen on the video splayed out unconscious on the street. Rocco Parascandola, New York Daily News, 29 June 2026 Prosecutors also said in the statement that Campbell secretly recorded the assaults while the women were naked and unconscious. Nicole Acosta, PEOPLE, 29 June 2026
Noun
During the fight, one of the officers was hit in the head and fell to the concrete unconscious, police said. Craig Shoup, Nashville Tennessean, 19 Aug. 2025 The unconscious doesn’t take direction. David O’Neill, New Yorker, 20 May 2026 See All Example Sentences for unconscious

Word History

First Known Use

Adjective

1712, in the meaning defined at sense 2a

Noun

1818, in the meaning defined above

Time Traveler
The first known use of unconscious was in 1712

Browse Nearby Words

Cite this Entry

“Unconscious.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/unconscious. Accessed 7 Jul. 2026.

Kids Definition

unconscious

1 of 2 adjective
1
: not aware
unconscious of having made a mistake
2
: having lost consciousness
knocked unconscious by a fall
3
: not realized : not consciously done
an unconscious mistake
unconscious humor
unconsciously adverb
unconsciousness noun

unconscious

2 of 2 noun
: the part of one's mental life of which one is not aware but which may influence behavior

Medical Definition

unconscious

1 of 2 adjective
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
unconsciously adverb
unconsciousness noun

unconscious

2 of 2 noun
: 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

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!