the condition of being awake and able to understand what is happening around you:
David lost consciousness (=went into a deep sleep) at eight o'clock and died a few hours later.
She could faintly hear voices as she began to regain consciousness (=wake up).
2 [uncountable and countable]
your mind and your thoughts:
The painful memories eventually faded from her consciousness.
Hypnosis is an altered state of consciousness.
research into human consciousness
someone's ideas, feelings, or opinions about politics, life etc:
The experience helped to change her political consciousness.
when you know that something exists or is true [= awareness]:
This will increase public consciousness of the pollution issue.