Early 17th century; earliest use found in Thomas Fitzherbert (1552–1640), Jesuit. From re- + post-classical Latin validat-, past participial stem of validare. Compare French revalider.
Definition of revalidate in US English:
revalidate
verbˌriːˈvalɪdeɪt
with objectTo validate again or once more.
Origin
Early 17th century; earliest use found in Thomas Fitzherbert (1552–1640), Jesuit. From re- + post-classical Latin validat-, past participial stem of validare. Compare French revalider.