valid

Meanings

1. 1
   adj

   still legally acceptable

   The license is still valid.

2. 2
   adj

   well grounded in logic or truth or having legal force

   You made a valid inference.

3. 3
   adj

   Well-grounded or justifiable, pertinent.

   I will believe him as soon as he offers a valid answer.

4. 4
   adj

   Acceptable, proper or correct; in accordance with the rules.

   A valid format for the date is DD/MM/YY.

5. 5
   adj

   Of an argument: whose conclusion is always true whenever its premises are true.

   An argument is valid if and only if the set consisting of both (1) all of its premises and (2) the contradictory of its conclusion is inconsistent.

6. 6
   adj

   Related to the current topic, or presented within context, relevant.

7. 7
   adj

   Of a formula or system: such that it evaluates to true regardless of the input values.

8. 8
   adj

   Genuine - as distinguished from efficient or regular - sacrament.

Etymology

Etymology tree Proto-Indo-European *h₂welh₁- Proto-Indo-European *h₂wl̥h₁éh₁yeti Proto-Italic *walēō Latin valeō Proto-Indo-European *dʰeh₁-der. Latin -idus Latin validusder. Middle French validebor. English valid Borrowed from Middle French valide (“healthy, sound, in good order”), from Latin validus, from valeō (“to be strong, to be healthy, to be worth”) + -idus, from Proto-Indo-European *h₂welh₁- (“be strong”).