When you're unconscious you're passed out or asleep. Anything going on in the body that we're not aware of can also be called unconscious.

Being unconscious can be very nice, especially when you're in the middle of a deep sleep. But if you're unconscious because you fainted or got hit in the head, that's not so good. Unconscious people aren't aware of what's going on, and they can't talk or do things — except maybe for sleepwalking and sleeptalking. There are also unconscious thoughts and desires: things going on in the mind that you don't know about.

Definitions of unconscious
  1. adjective
    not conscious; lacking awareness and the capacity for sensory perception as if asleep or dead
    “lay unconscious on the floor”
    in a state of sleep
    incognizant, unaware
    (often followed by `of') not aware
    unconscious from a blow or shock or intoxication
    in a state of deep and usually prolonged unconsciousness; unable to respond to external stimuli
    (used of things) lacking sense or awareness
    insensible, senseless
    unresponsive to stimulation
    KO'd, kayoed, knocked out, out, stunned
    knocked unconscious by a heavy blow
    concerning mental functioning that is not represented in consciousness
    in a state of partial coma
    just below the level of consciousness
    incapable of physical sensation
    involuntary, nonvoluntary, unvoluntary
    not subject to the control of the will
    see moresee less
    knowing and perceiving; having awareness of surroundings and sensations and thoughts
    not in a state of sleep; completely conscious
    aware, cognisant, cognizant
    (sometimes followed by `of') having or showing knowledge or understanding or realization or perception
    self-aware, self-conscious
    aware of yourself as an individual or of your own being and actions and thoughts
    partially conscious; not completely aware of sensations
    consciously perceiving
    sensible, sensitive
    able to feel or perceive
    of your own free will or design; done by choice; not forced or compelled
    show more antonyms...
  2. adjective
    without conscious volition
    involuntary, nonvoluntary, unvoluntary
    not subject to the control of the will
  3. adjective
    (followed by `of') not knowing or perceiving
    “"happily unconscious of the new calamity at home"- Charles Dickens”
    incognizant, unaware
    (often followed by `of') not aware
  4. noun
    that part of the mind wherein psychic activity takes place of which the person is unaware
    synonyms: unconscious mind
    see moresee less
    type of:
    brain, head, mind, nous, psyche
    that which is responsible for one's thoughts and feelings; the seat of the faculty of reason
Commonly confused words

unconscionable / unconscious

These two words look and sound similar. In fact, if you think too hard about them together, you might find your tongue tripping over them.

Continue reading...

Word Family

Test prep from the experts

Boost your test score with programs developed by’s experts.

  • Proven methods: Learn faster, remember longer with our scientific approach.
  • Personalized plan: We customize your experience to maximize your learning.
  • Strategic studying: Focus on the words that are most crucial for success.


  • Number of words: 500+
  • Duration: 8 weeks or less
  • Time: 1 hour / week


  • Number of words: 500+
  • Duration: 10 weeks or less
  • Time: 1 hour / week


  • Number of words: 700+
  • Duration: 10 weeks
  • Time: 1 hour / week