Definition of posaune in English:

posaune

Pronunciation /pə(ʊ)ˈzaʊnə/

noun

Music
  • An organ reed stop resembling a trombone in tone.

Origin

Early 18th century (in an earlier sense). From German Posaune trumpet, trombone, organ reed stop resembling a trombone in tone from Old French busine, bosine, bousine.