[mass noun]the state or practice of refraining from extramarital, or especially from all, sexual intercourse (对婚姻的)忠贞;贞洁(尤指禁欲) vows of chastity. 保持贞洁的誓约。
语源
Middle English: from Old French chastete, from Latin castitas, from castus 'morally pure' (see chaste)