| ̷ ̷ ̷ ̷| ̷ ̷ transitive verb
1. : to act or perform (as a part) to excess : exaggerate in acting
2. obsolete : to outdo in acting
3. obsolete : to act upon or influence unduly
intransitive verb
1. : to act more than is necessary : go to excess in action
which muscles of the eyes are … overacting — H.G.Armstrong
2. : to overact a part