the fact of something, for example a marriage, having no legal force or no longer being officially recognized; something which is no longer officially recognized 無法律約束力;無效;無法律效力的事物 a decree of nullity (= a statement saying that a marriage is no longer legal) 無效判決 The decision of the committee can now be regarded as a nullity. 委員會的決定現在可以被視爲無效。
Word Originmid 16th cent.: from French nullité, from medieval Latin nullitas, from Latin nullus ‘none’.