Blaue ReiterPronunciation: /ˌblaʊə ˈrʌɪtə/Definition of Blaue Reiter a group of German expressionist painters formed in 1911, based in Munich. The group included Wassily Kandinsky, Jean Arp, and Paul Klee. Origin:German, literally 'blue rider', the title of a painting by KandinskyBlaue Reiter in other Oxford dictionaries Definition of Blaue Reiter in the US English dictionary