n. One who plays on an organ, especially a pipe-organ; specifically, in modern churches, the regular official charged with playing the organ and often with the management of all the music of the service.n. In medieval music, a singer who sang some other part than the cantus firmus or melody. Also organizer.n. In ornithology, a West Indian tanager, Euphone or Euphonia musica: so called from its musical powers. The name is also given to other tanagers of this genus.