1 abstaining from extramarital, or from all, sexual intercourse.
2 (of behaviour, speech, etc.) pure, virtuous, decent.
3 (of artistic etc. style) simple, unadorned.
Phrases and idioms:
chaste-tree an ornamental shrub, Vitex agnus-castus, with blue or white flowers.
Derivatives:
chastely adv. chasteness n.
Etymology: ME f. OF f. L castus
Useful english dictionary. 2012.