purgation[pə:'ɡeiʃən]n.1.■净化,洗涤,清洗2.■洗罪,涤罪3.■(吃泄药)通便4.■[古语](自行发誓或依审判法)雪冤,证明无罪put someone to his purgation要求某人自行洗刷别人对他的指责;质问某人[莎士比亚用语]