\Val"id\, a. [F. valide, F. validus strong, from valere to
be strong. See {Valiant}.]
1. Strong; powerful; efficient. [Obs.] ``Perhaps more valid
   arms . . . may serve to better us.'' --Milton.

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. --I.
                                               Taylor.

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.

Syn: Prevalent; available; efficacious; just; good; weighty;
     sufficient; sound; well-grounded.