Meaning

noun a person who has never had sex

noun (astrology) a person who is born while the sun is in Virgo

noun the sixth sign of the zodiac; the sun is in this sign from about August 23 to September 22

originFrom virgin, q.v. The sense of Mary, mother of Jesus, comes from the Christian belief in Jesus's virgin birth and Mary's freedom from sin. The river sense derives from the name of Thomas Virgin, a member of the first American party to see the river, led by Jedediah Smith in 1826. The town sense derives from the name of the river, along which it is located.

Etymology from Wiktionary, CC BY-SA 3.0