Meaning of VALID in English

VALID

adj.1 (of a reason, objection, etc.) sound or defensible; well-grounded.

2 a executed with the proper formalities (a valid contract). b legally acceptable (a valid passport). c not having reached its expiry date.

Derivatives:

validity n. validly adv.

Etymology: F valide or L validus strong (as VALIANT)

Oxford English vocab.      Оксфордский английский словарь.