Meaning

adjective well grounded in logic or truth or having legal force

adjective still legally acceptable

originEtymology tree Proto-Indo-European *h₂welh₁- Proto-Indo-European *h₂wl̥h₁éh₁yeti Proto-Italic *walēō Latin valeō Proto-Indo-European *dʰeh₁-der. Proto-Italic *-iðos 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…

Etymology from Wiktionary, CC BY-SA 3.0