validity

Meanings

1. 1
   noun

   The state of being based on truth, sound reasoning, or solid evidence.

   Several scientists questioned the validity of the study's conclusions.

2. 2
   noun

   The quality of being legally binding or in force.

   You should check the validity of your passport before booking the trip.

3. 3
   noun

   In testing, the degree to which a measure actually measures what it is meant to measure.

   The researchers ran extra checks to confirm the validity of their new questionnaire.

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

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