\Vouch\, v. t. [imp. & p. p. {Vouched}; p. pr. & vb. n.
{Vouching}.] [OE. vouchen, OF. vochier to call, fr. L. vocare
to call, fr. vox, vocis, voice. See {Voice}, and cf.
{Avouch}.]
1. To call; to summon. [Obs.]
         [They] vouch (as I might say) to their aid the
         authority of the writers.             --Sir T.
                                               Elyot.
2. To call upon to witness; to obtest.
         Vouch the silent stars and conscious moon. --Dryden.
3. To warrant; to maintain by affirmations; to attest; to
   affirm; to avouch.
         They made him ashamed to vouch the truth of the
         relation, and afterwards to credit it. --Atterbury.
4. To back; to support; to confirm; to establish.
         Me damp horror chilled At such bold words vouched
         with a deed so bold.                  --Milton.
5. (Law) To call into court to warrant and defend, or to make
   good a warranty of title.
         He vouches the tenant in tail, who vouches over the
         common vouchee.                       --Blackstone.
Syn: To obtest; declare; affirm; attest; warrant; confirm;
     asseverate; aver; protest; assure.

\Vouch\, v. i.
1. To bear witness; to give testimony or full attestation.
         He will not believe her until the elector of Hanover
         shall vouch for the truth of what she has . . .
         affirmed.                             --Swift.
2. To assert; to aver; to declare. --Shak.

\Vouch\, n.
Warrant; attestation. [Obs.]
      The vouch of very malice itself.         --Shak.