Valid
Valid , adjective
[French valide, Latin validus strong, from valere to be strong. See Valiant.]
1.
Strong; powerful; efficient. [Obsolete]
Perhaps more valid arms... may serve to better us.
2.
Having sufficient strength or force; founded in truth; capable of being justified, defended, or supported; not weak or defective; sound; good; efficacious; as, a valid argument; a valid objection.
An answer that is open to no valid exception.
3.
(Law) Having legal strength or force; executed with the proper formalities; incapable of being rightfully overthrown or set aside; as, a valid deed; a valid covenant; a valid instrument of any kind; a valid claim or title; a valid marriage.