KEUPER Meaning of KEUPER in English [ 'kɔɪpə ]■ noun Geology a European series of sedimentary rocks of Upper Triassic age, represented in England chiefly by marls and sandstones.OriginC19 (orig. a miners' term): Ger. Concise Oxford English vocab. Сжатый оксфордский словарь английского языка. 2004