| Meaning | A state lacking normal awareness of the self or environment. |
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| Narrower | automatic pilot, autopilot | A cognitive state in which you act without self-awareness |
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| blackout | A momentary loss of consciousness |
| coma, comatoseness | A state of deep and often prolonged unconsciousness |
| electrosleep | unconsciousness brought about by the passage of a low voltage electric current through the brain |
| grogginess, stupor, stupefaction, semiconsciousness | marginal consciousness |
| insensibility | A lack of sensibility |
| narcosis | unconsciousness induced by narcotics or anesthesia |
| semicoma | A mild comatose state |
| semitrance | A trancelike state in which the person can follow instructions but voluntary action is weak or absent |
| trance | A state of mind in which consciousness is fragile and voluntary action is poor or missing |
| unknowingness, unawareness | unconsciousness resulting from lack of knowledge or attention |
| Broader | cognitive state, state of mind | The state of a person's cognitive processes |
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| Opposite | consciousness | An alert cognitive state in which you are aware of yourself and your situation |
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| Spanish | inconsciencia |
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| Catalan | inconsciència |
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| Adjectives | unconscious | not conscious |
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| unconscious | (followed by 'of') not knowing or perceiving |
