• A slattern. • The name of a female fairy, esp. the queen of the fairies; and hence, sometimes, any fairy. • p. p. of Made. • Disordered in intellect; crazy; insane. • Excited beyond self-control or the restraint of reason; inflamed by violent or uncontrollable desire, passion, or appetite; as, to be mad with terror, lust, or hatred; mad against political reform. • Proceeding from, or indicating, madness; expressing distraction; prompted by infatuation, fury, or extreme rashness. • Extravagant; immoderate. • Furious with rage, terror, or disease; -- said of the lower animals; as, a mad bull; esp., having hydrophobia; rabid; as, a mad dog. • Angry; out of patience; vexed; as, to get mad at a person. • Having impaired polarity; -- applied to a compass needle. • To make mad or furious; to madden. • To be mad; to go mad; to rave. See Madding. • An earthworm.