pleˈbiscitarismrare—1. [ad. F. plébiscitarisme, f.plébiscitaire(see next) + -ism.] The principle or practice of appealing to a plebiscite. 1888Times 17 Apr. 5/3 The..Etoile Belge says that neither speeches nor objurgations can stem the rising flood of plebiscitarism.