validity

Etymology

valid + -ity, borrowed from Middle French validité, from Late Latin validitas.

noun

  1. The state of being valid, authentic or genuine.
  2. State of having legal force.
  3. A quality of a measurement indicating the degree to which the measure reflects the underlying construct, that is, whether it measures what it purports to measure (see reliability).
  4. (Christianity, theology) The genuinity - as distinguished from the efficacity or the regularity - of a sacrament as a result of some formal dispositions being fulfilled.

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