diapason: Meaning and Definition of

di•a•pa•son

1. a full, rich outpouring of melodious sound.
2. the compass of a voice or instrument.
3. a fixed standard of pitch.
4. either of two principal timbres or stops of a pipe organ, one of full, majestic toneand the other of strong, flutelike tone
5. any of several other organ stops.
6. a tuning fork.