valid

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val·id

(val'id),
Effective; producing the desired result; verifiably correct.
[L. valeo, to be strong]

valid

adjective
(1) Sound; competent; sensible.
(2) Well-grounded on available evidence.
(3) Able to withstand criticism or objection.

valid

(văl′ĭd) [L. validus, strong]
Producing the desired effect; correct.

val·id

(val'id)
Effective; producing desired result; verifiably correct.
[L. valeo, to be strong]