Living voice; verbally. It is said a witness delivers his evidence viva voce, when he does so in open court; the term is opposed to deposition. It is sometimes opposed to ballot; as, the people vote by ballot, but their representatives in the legislature, vote viva voce.
Law Dictionary – Alternative Legal Definition
(Latin). With the living voice; by word of mouth. As applied to the examination of witnesses, this phrase is equivalent to “orally.” It is used in contra distinction to evidence on affidavits or depositions. As descriptive of a species of voting, it signifles voting by speech or outcry, as distinguished from voting by a written or printed ballot