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Dictionary Definition of mad
mad adjective ( madder, maddest ) 1. disordered in intellect; insane. 2. Colloquial moved by anger. 3. (of wind, etc.) furious in violence. 4. (of animals) a. abnormally furious: a mad bull. b. affected with rabies; rabid: a mad dog. 5. wildly excited; frantic: mad haste. 6. senselessly foolish or imprudent: a mad scheme. 7. wild with eagerness or desire; infatuated: to be mad about someone. 8. wildly gay or merry: to have a mad time. -- phrase 9. like mad, a. in the manner of a madman. b. with great haste, impetuosity, or enthusiasm. 10. mad as a cut snake or mad as a meat axe, Colloquial a. insane; crazy. b. very angry. [ME mad, madd ( e ), OE gemęd ( d ), gemęded, pp. of a verb derived from OE gemad mad, c. OHG gameit foolish] |