Norwegian Bokmål Etymology From German Preuße. Noun prøysser m (definite singular prøysseren, indefinite plural prøyssere, definite plural prøysserne) (historical) a Prussian (person from Prussia) Related terms Preussen prøyssisk See also prøyssar (Nynorsk) References “prøysser” in The Bokmål Dictionary.Wikiwand - on Seamless Wikipedia browsing. On steroids.