messer /ˈmɛsə(ɹ)/noun 2/məˈsɛə(ɹ)/ noun 1forms 1 noun2 •Someone or something who messes. •A single-edged sword with a knife-like hilt. messer /məˈsɛə(ɹ)/ noun1 •(no longer used) Form of address equivalent to signore. formsmessers