- 1exert something to use power or influence to affect someone or something He exerted all his authority to make them accept the plan. The moon exerts a force on the earth that causes the tides.
- 2exert yourself to make a big physical or mental effort In order to be successful, he would have to exert himself.
NAmE//ɪɡˈzərt//Verb Forms present simple I / you / we / they exert
he / she / it exerts
past simple exerted
-ing form exerting