Megaera. One of the Furies; sometimes said to personify a guilty conscience. The names of the Furies were: Tisiphone, whose particular work was to originate fatal epidemics and contagion; Alecto, to whom was ascribed the devastations and cruelties of war; and Megaera, the author of insanity and murders. Temples were consecrated to them among both the Greeks and the Romans, and among the latter a festival also.