MISFEASANCE Meaning of MISFEASANCE in English n. Law a transgression, esp. the wrongful exercise of lawful authority. [ ME f. OF mesfaisance f. mesfaire misdo (as MIS-(2), faire do f. L facere): cf. MALFEASANCE ] Concise Oxford English dictionary. Краткий оксфордский словарь английского языка. 2012