Definition of "diapason" [di•a•pa•son]

• A full, rich outpouring of harmonious sound. (noun)
• The entire range of an instrument or voice. (noun)
• Either of the two principal stops on a pipe organ that form the tonal basis for the entire scale of the instrument. (noun)
• The interval and the consonance of an octave. (noun)
• A standard indication of pitch. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "The diapason, etc. _The diapason_ means here _the entire compass of tones_."
• "Now, the diapason is the ad interium, or interval betwixt and between the extremes of an octave, according to the diatonic scale."
• "D darkness of calamity dash of eccentricity dawning of recognition day of reckoning daylight of faith decay of authority declaration of indifference deeds of prowess defects of temper degree of hostility delicacy of thought delirium of wonder depth of despair dereliction of duty derogation of character despoiled of riches destitute of power desultoriness of detail [desultoriness = haphazard; random] device of secrecy devoid of merit devoutness of faith dexterity of phrase diapason of motives [diapason = full, rich, harmonious sound] dictates of conscience difference of opinion difficult of attainment dignity of thought dilapidations of time diminution of brutality disabilities of age display of prowess distinctness of vision distortion of symmetry diversity of aspect divinity of tradition domain of imagination drama of action dream of vengeance drop of comfort ductility of expression dull of comprehension duplicities of might dust of defeat"