a full, rich outpouring of melodious sound
the compass of a voice or instrument.
a fixed standard of pitch.
either of two principal timbres or stops of a pipe organ, one of full, majestic tone (open diapason) and the other of strong, flutelike tone (stopped diapason)
any of several other organ stops.
Origin: Related forms
1350–1400; Middle English diapasoun < Latin diapāsōn the whole octave < Greek dià pāsôn (chordôn) through all (the notes), short for hē dià pāsôn chordôn symphōnía the concord through all the notes of the scale