01 a. Sounding harshly; discordant; unharmonious.
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1.
Sounding harshly; discordant; unharmonious.“With clamor of voices dissonant and loud.” — Longfellow.
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2.
Disagreeing; incongruous; discrepant, -- with from or to.“What can be dissonant from reason and nature than that a man, naturally inclined to clemency, should show himself unkind and inhuman?” — Hakewill.