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lose consciousness

VERB
black out
Synonyms
STRONGEST
pass out
WEAK
collapse crap out draw a blank go out like a light slip into coma swoon zone out
Antonyms
WEAK
add pencil in resuscitate revive uncover
VERB
pass out
Synonyms
STRONGEST
faint swoon
WEAK
drop from abusing a substance black out keel over
VERB
swoon
Synonyms
STRONGEST
pass out
STRONG
collapse drop weaken
WEAK
be overcome become unconscious black out feel giddy feel lightheaded go out like a light keel over

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.

She added that she was running out of medication for a heart condition known as Postural Orthostatic Tachycardia Syndrome, with the stress making it worse and causing her to lose consciousness.

From BBC • Mar. 3, 2026

The two carotid arteries carry 70% of the brain’s blood flow; block them, and a person can quickly lose consciousness.

From Salon • Jan. 14, 2026

A person can lose consciousness, have seizures, collapse, vomit, and fall into a coma.

From Slate • Aug. 17, 2025

Both offer a critique of bedside manner; patients that, seemingly fine, suddenly lose consciousness; red herrings, dead ends and wrong trees to bark up.

From Los Angeles Times • Jan. 9, 2025

And at all costs he must not lose consciousness right now.

From "The Metamorphosis" by Franz Kafka