To call to witness.To declare; assert; affirm; attest; avouch.To warrant; be surety for; answer for; make good; confirm.To support; back; second; follow up.In law: To produce vouchers for, in support of a charge in account.In old English law, to call or summon into court to warrant and defend, or to make good a warranty of title.Synonyms To asseverate, aver, protest.To bear witness; give testimony or attestation: more specifically, in old English law, to call in some one to make good his alleged warranty of title; be surety or guaranty.n. Approving or supporting warrant; confirmation; attestation.