#1 vouch v. give personal assurance; guarantee; "Will he vouch for me?". wn
#2 vouch v. [guarantee] give surety or assume responsibility; "I vouch for the quality of my products". wn
#3 vouch v. summon (a vouchee) into court to warrant or defend a title. wn
#4 vouch v. give supporting evidence; "He vouched his words by his deeds". wn
vizzz