- 1 boost something to make something increase, or become better or more successful to boost exports/profits The movie helped boost her screen career. to boost someone's confidence/morale Getting that job really boosted his ego (= made him feel more confident).
- 2 boost something (informal) (becoming old-fashioned) to steal something
NAmE//bust//Verb Forms present simple I / you / we / they boost
he / she / it boosts
past simple boosted
-ing form boosting