Chastity \ch(a)-sti-ty, chas-tity\ as a girl's name is pronounced CHASS-ti-tee. It is of Latin origin, and the meaning of Chastity is "pure". From Late Latin "castitas", a derivative of "castus". A virtue name. This name has been familiar since the 1970s due to Chastity Bono, daughter of singer/actress Cher and singer/actor/politician Sonny Bono. Chasida is a saint's name.
For more information, see also the related name Purity.