Vicarious

The word vicarious has been misused by the people around me, and therefore by me... wordnet says:

vicarious
adj 1: experienced at secondhand; "read about mountain climbing and
felt vicarious excitement"
2: (medicine) occurring in an abnormal part of the body instead
of the usual site involved in that function; "vicarious
menstruation"
3: suffered or done by one person as a substitute for another;
"vicarious atonement"

I was thinking it meant completely or to the full extent possible, but it actually means 2nd hand, or in the place of... (Christ was a vicarious sacrifice for the sins of man...)