Definition of vestals:
(adj) :
Pure; chaste.
(n) :
A female virgin; a woman who has never had sexual relations.
(n) :
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.
(adj) :
Of or pertaining to Vesta, the virgin goddess of the hearth.
(n) :
A nun.
(adj) :
(astronomy) Synonym of Vestan (Pertaining to the asteroid Vesta)