coma

co-ma · noun

imported

Definitions

noun

  1. 1.

    A state of deep unconsciousness from which a person cannot be awakened.

  2. 2.

    (astronomy) The cloud of gas and dust surrounding the nucleus of a comet.

Forms

plural: comas

Phrases & expressions

  • •
    in a coma — in a state of deep unconsciousness
  • •
    induced coma — a medically induced state of unconsciousness
  • •
    come out of a coma — regain consciousness

Related words

Antonyms: consciousness, wakefulness
See also: consciousness, sleep, unconscious
Synonyms: stupor, unconsciousness

Etymology

From Greek koma meaning "deep sleep," related to keimai ("to lie down").