Definition of malfeasance

< malevolent

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mal·fea·sance    (ml-fzns) KEY 

NOUN:

Misconduct or wrongdoing, especially by a public official.

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ETYMOLOGY:
Anglo-Norman malfaisance, from Old French malfaisant, malfeasant, present participle of malfaire, to do evil, from Latin malefacere ; see malefactor

OTHER FORMS:
mal·feasant(Adjective)(Noun)