To attack or infect, as a disease:
To spoil the effect of by exaggeration
To play the part of; assume the dramatic role of:
To exaggerate or overdo (a dramatic role, for example).
To increase or enlarge to an extreme or abnormal degree; overemphasize; intensify
To overestimate the strength of (one's holding or position) with resulting defeat:
To act (a theatrical role) with insufficient emphasis or too great restraint
Find another word for overact. In this page you can discover 14 synonyms, antonyms, idiomatic expressions, and related words for overact, like: affect, overdo, act, ham, ham-up, exaggerate, ham-it-up, overplay, underact, miscast and unfunny.