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1.
Verb: to restore the hymen; a few decades of celibacy is
required to "revirginate." It can be done metaphorically, if
not biologically. Once revirginated, a woman is able to
"feel like a virgin" again.

Noun: revirginated: A desirable state of retrieved innocence acquired by abstinence from sexual relations, intoxicants of all kinds, and wholesome thinking.
She had abstained from intercourse and unwholesome
habits for so long that she revirginated.
by Pamelot May 22, 2010
 
2.
to regain one's virginity from not having sex (or fucking) with someone else for a long time
Because of Bill's surgery, he and Judy hadnt had sex in so long that they revirginated!
by EvaNadine September 23, 2004