Emily Dickinson Lexicon

VOUCH, v.t. [Norm. voucher; L. voco. See Voice.]

1. To call to witness; to obtest. And vouch the silent stars and conscious moon. – Dryden.
2. To declare; to affirm; to attest; to warrant; to maintain by affirmations. They made him ashamed to vouch the truth of the relation, and afterward to credit it. – Atterbury.
3. To warrant; to confirm; to establish proof. The consistency of the discourse… .vouches it to be worthy of the great apostle. – Locke.
4. In 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.