What is the meaning of the word "virgin"?

Definitions:

a person who has never had sexual intercourse; what defines sexual intercourse in this context varies widely in interpretation from person to person, and situation to situation; various factors include gender of participants, level of consent of participants, physical configuration, having reached orgasm or not, and other elements that might lead one to believe one is a virgin or not noun
- I'm not sure if I'm a virgin or not.
being unaffected by human intervention; natural adjective
- The virgin spring water was wonderful to drink.
being unaffected by human intervention; natural adjective
- The virgin spring water was wonderful to drink.
being used or worked for the first time adjective
- We bought some virgin wool to make a sweater out of.
in a state of sexual virginity; see discussion of noun meaning adjective
- Segregated housing was, in part, an effort to keep the students virgin.