Definition of unisonance
: a blending of sound The first two sounds reach the ear as a unisonance—the booming impact of the tons of water and the wild roar of the up-rush blending—and this mingled sound dissolves into the foam-bubble hissing of the third. — Henry Beston, The Outermost House, 1928; especially : unison
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Origin and Etymology of unisonance
2unison + -ance
First Known Use: 1721
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