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Misconduct or wrongdoing, especially by a public official.
[Anglo-Norman malfaisance, from Old French malfaisant, malfeasant, present participle of malfaire, to do evil, from Latin malefacere; see malefactor.]
mal·fea′sant adj. & n.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.