D defs.my
Entry 3 senses · 2 variants Webster, 1913

Overact

/ōv'-ẽr-ăktˌ/ · O·ver·act · IPA /ˌəʊvəɹˈækt/
01 v. t. To act or perform to excess; to exaggerate in acting; as, he overacted his part.
  1. 1.
    To act or perform to excess; to exaggerate in acting; as, he overacted his part.
  2. 2.
    To act upon, or influence, unduly.[Obs.]
    “The hope of inheritance overacts them.” Milton.
02 v. i. To act more than is necessary; to go to excess in action.
  1. 1.
    To act more than is necessary; to go to excess in action.