Malfeasance \Mal*fea"sance\, n. [F. malfaisance, fr. malfaisant injurious, doing ill; mal ill, evil + faisant doing, p. pr. of faire to do. See {Malice}, {Feasible}, and cf. {Maleficence}.] (Law) The doing of an act which a person ought not to do; evil conduct; an illegal deed. [Written also {malefeasance}.] web1913

malfeasance n : a wrongful act that the actor had no right to do; improper professional conduct; "he charged them with electoral malpractices" [syn: {malpractice}] wn