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misfeasance

[mis-fee-zuh ns]
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noun Law.
  1. a wrong, actual or alleged, arising from or consisting of affirmative action.
  2. the wrongful performance of a normally lawful act; the wrongful and injurious exercise of lawful authority.
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Origin of misfeasance

From the Anglo-French word mesfesance, dating back to 1590–1600. See mis-1, feasance
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

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British Dictionary definitions for misfeasance

misfeasance

noun
  1. law the improper performance of an act that is lawful in itselfCompare malfeasance, nonfeasance
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Derived Formsmisfeasor, noun

Word Origin

C16: from Old French mesfaisance, from mesfaire to perform misdeeds
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for misfeasance

n.

"wrongful exercise of lawful authority or improper performance of a lawful act," 1590s, from Middle French mesfaisance, from mesfaisant, present participle of Old French mesfaire "to misdo," from mes- "wrongly" (see mis- (2)) + faire "to do," from Latin facere "to perform" (see factitious).

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Online Etymology Dictionary, © 2010 Douglas Harper