validity

/V AH0 L IH1 D AH0 T IY0/
noun
  1. 1

    The state of being valid, authentic or genuine.

  2. 2

    State of having legal force.

  3. 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).

Source: https://en.wiktionary.org/wiki/validity