A false accusation, or a malicious statement, about someone.(noun)
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Use "calumniation" in a sentence
"If we're going by just "overrated" not all the way to "terribly disappointing" I'd like to nominate Lolita, as, even though it's a calumniation of many Nabikov obsessions, it is certainly not his best."
"Thou hast grieved over my calumniation, and likewise hast lamented the damage to my good name."
"My friend Rafael Sabatini, than whom no man living has dug deeper into Borgia history, explains the calumniation of Lucretia in this fashion: Adultery and promiscuous intercourse were the fashion in Rome at the time of Alexander VI."