A·vouch v. t. [imp. & p. p. Avouched (░); p. pr. & vb. n. Avouching.]
 1. To appeal to; to cite or claim as authority. [Obs.]
    They avouch many successions of authorities.   --Coke.
 2. To maintain a just or true; to vouch for.
    We might be disposed to question its authenticity, it if were not avouched by the full evidence.   --Milman.
 3. To declare or assert positively and as matter of fact; to affirm openly.
    If this which he avouches does appear.   --Shak.
    Such antiquities could have been avouched for the Irish.   --Spenser.
 4. To acknowledge deliberately; to admit; to confess; to sanction.
    Thou hast avouched the Lord this day to be thy God.   --Deut. xxvi. 17.