Definition of "vestal"

vestal

/ˈvɛs.t(ə)l/

adjective
not comparable
1. Of or pertaining to Vesta, the virgin goddess of the hearth.
2. Pure; chaste.
  Quotations
  Does money fail?—come to my mint—coin paper,Till gold be at a discount, and ashamedTo show his bilious face, go purge himself,In emulation of her vestal whiteness.
  1820, Percy Bysshe Shelley, Oedipus Tyrannus; Or, Swellfoot The Tyrant: A Tragedy in Two Acts
noun
plural vestals
1. A virgin consecrated to Vesta, and to the service of watching the sacred fire, which was to be perpetually kept burning upon her altar; a vestal virgin.
2. A female virgin; a woman who has never had sexual relations.
3. A nun.