Not having sexual relations despite wishing to.
A member of an online subculture of people (mostly men) who define themselves as unable to find a romantic or sexual partner despite desiring one.
Anyone who is not sexually active despite desiring to be.
"Involuntary celibacy": the state of not being sexually active despite wishing to be.
A person who is voluntarily celibate, i.e., who chooses to avoid sexual activity with other people.