Definition of omnitonic in English:

omnitonic

adjective

Music
historical
  • 1Designating or relating to a musical instrument, especially a horn, which is so constructed as to allow it to be played in any key.

  • 2Relating to all tones or tonalities; specifically relating to or designating a theory of harmony which allows for continuous modulation between keys.

Origin

Mid 19th century; earliest use found in The Times. From omni- + tonic, after French omnitonique.

Pronunciation

omnitonic

/ˌɒmnɪˈtɒnɪk/