overact - definition and synonyms

verb [intransitive/transitive] 

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/ˌəʊvərˈækt/
present tense
I/you/we/theyoveract
he/she/itoveracts
present participleoveracting
past tenseoveracted
past participleoveracted
  1. if an actor overacts, they perform with too much energy or emotion so that their performance seems false
     Synonyms and related words