Unconsciousness is a state of being unaware of what's going on around you, either because you're not awake or because you're simply oblivious. If you fall asleep during a movie, and your unconsciousness means you'll miss the ending.

Even if everyone in your family is mad at each other, your little cousin's unconsciousness of the argument might make it easier to have a peaceful Thanksgiving. And after the meal, the great quantities of food eaten may result in the unconsciousness of half the guests, who doze in the living room, snoring softly. In both kinds of unconsciousness, someone isn't conscious, or aware, of their surroundings.

Definitions of unconsciousness

n a state lacking normal awareness of the self or environment

an alert cognitive state in which you are aware of yourself and your situation
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automatic pilot, autopilot
a cognitive state in which you act without self-awareness
unawareness, unknowingness
unconsciousness resulting from lack of knowledge or attention
a momentary loss of consciousness
grogginess, semiconsciousness, stupefaction, stupor
marginal consciousness
coma, comatoseness
a state of deep and often prolonged unconsciousness; usually the result of disease or injury
unconsciousness brought about by the passage of a low voltage electric current through the brain
a mild comatose state; a coma from which the person can be roused by appropriate stimuli
a lack of sensibility
a state of mind in which consciousness is fragile and voluntary action is poor or missing; a state resembling deep sleep
a trancelike state in which the person can follow instructions but voluntary action is weak or absent
unconsciousness induced by narcotics or anesthesia
unawareness caused by neglectful or heedless failure to remember
the quality of being not self-conscious; unawareness of yourself or of others' views of yourself
Kussmaul's coma, diabetic coma
coma that can develop in inadequately treated cases of diabetes mellitus
hepatic coma
coma that can occur in severe cases of liver disease
hypnotic trance
a trance induced by the use of hypnosis; the person accepts the suggestions of the hypnotist
ecstatic state, religious trance
a trance induced by intense religious devotion; does not show reduced bodily functions that are typical of other trances
nitrogen narcosis
confused or stuporous state caused by high levels of dissolved nitrogen in the blood
Type of:
cognitive state, state of mind
the state of a person's cognitive processes

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