Besserwisser in English dictionary Besserwisser Meanings and definitions of "Besserwisser" A know-it-all, wiseguy, wiseacre, smart aleck. noun A know-it-all, wiseguy, wiseacre, smart aleck. more Grammar and declension of Besserwisser Besserwisser ( plural Besserwissers) Besserwisser (plural Besserwissers) more Sample sentences with "Besserwisser" Declension Stem Try again Authors