transitive verb

1. to uphold by demonstration or evidence
2. Archaic
   1. to attest or affirm
   2. to cite in support of one's views or actions
3. in old English law, to call (a person) into court to give warranty of title

Etymology: ME vouchen < OFr vocher < L vocare, to call < vox, voice

intransitive verb

1. to give assurance, affirmation, or a guarantee: with for to vouch for someone's honesty
2. to serve as evidence or assurance (for) references vouching for his ability

noun