English▸ adjective (of an argument or point) having a sound basis in logic or fact; reasonable or cogent:
a valid criticism.
▪ legally binding due to having been executed in compliance with the law:
a valid contract.
▪ legally or officially acceptable:
the visas are valid for thirty days
a valid password.
– ORIGIN late 16th century: from French valide or Latin validus ‘strong’, from valere ‘be strong’.