Someone who is unconscious is in a state similar to sleep, usually as the result of a serious injury or a lack of oxygen.
e.g. By the time ambulancemen arrived he was unconscious...
e.g. He was dragged from his van and beaten unconscious by a gang of salmon poachers.
He knew that he might soon lapse into unconsciousness.
If you are unconscious of something, you are unaware of it.
e.g. He himself seemed totally unconscious of his failure...
e.g. Mr Battersby was apparently quite unconscious of their presence.
'I was very unsure of myself after the divorce,' she says, unconsciously sweeping back the curls from her forehead.
If feelings or attitudes are unconscious, you are not aware that you have them, but they show in the way that you behave.
e.g. Unconscious envy manifests itself very often as this kind of arrogance...
e.g. 'You're well out of it,' Christopher said with unconscious brutality.
Many women whose fathers left home unconsciously expect to be betrayed by their own mates...
I think racism is unconsciously inherent in practically everyone.
Your unconscious is the part of your mind that contains feelings and ideas that you do not know about or cannot control.
e.g. In examining the content of the unconscious, Freud called into question some deeply-held beliefs.