v. t. 1. To act or perform to excess; to exaggerate in acting; as, he overacted his part. [ 1913 Webster ]
2. To act upon, or influence, unduly. [ Obs. ] [ 1913 Webster ]
The hope of inheritance overacts them. Milton. [ 1913 Webster ]
v. i. To act more than is necessary; to go to excess in action. B. Jonson. [ 1913 Webster ]
n. Performance to excess; exaggerated or excessive action. [ 1913 Webster ]