nullity

nullity
(pl. -ies)
  1. (Law)an act or thing that is legally void
    (律)法律上无效的行为;法律上无效的东西
    ■[mass noun]the state of being legally void; invalidity, especially of a marriage
    法律上的无效;无法律效力(尤指婚姻)
  2. a thing of no importance or worth
    不重要的东西,无价值的东西
    ■[mass noun]nothingness
    无,不存在
语源
  1. mid 16th cent.: from French nullité, from medieval Latin nullitas, from Latin nullus 'none'
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