Pronunciation: (vouch),[key] —v.i. 1. to support as being true, certain, reliable, etc. (usually fol. by for): Her record in office vouches for her integrity. 2. to attest; guarantee; certify (usually fol. by for): to vouch for someone in a business transaction.
—v.t. 1. to sustain or uphold by, or as if by, practical proof or demonstration.
2. (formerly) to call or summon (a person) into court to make good a warranty of title.
3. to adduce or quote in support, as extracts from a book or author; cite in warrant or justification, as authority, instances, facts, etc.
4. Archaic.to warrant or attest; to support or authenticate with vouchers.
5. Archaic.to declare as with warrant; vouch for.
6. Obs.to call or take as a witness.
—n.Obs. 1. a vouching; an assertion.
2. a formal attestation; a supporting warrant.