Misconduct or wrongdoing, especially by a public official. (noun)
American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Use "malfeasance" in a sentence
"If you're a professional, exposure of your malfeasance is the critic's job."
"In the REAL WORLD this kind of malfeasance is scienter for a class action."
"But all this malfeasance is done by state and local governments."