- 1[intransitive, transitive] decelerate (something) to reduce the speed at which something, especially a vehicle, is traveling
- 2[intransitive, transitive] decelerate (something) to become or make something become slower synonym slow down Economic growth decelerated sharply in June. opposite accelerate
decelerate
verbNAmE//ˌdiˈsɛləˌreɪt//
(formal)Verb Forms present simple I / you / we / they decelerate he / she / it decelerates
past simple decelerated
-ing form decelerating
NAmE//ˌdiˌsɛləˈreɪʃn//
noun [uncountable]See decelerate in the Oxford Advanced Learner's DictionaryCheck pronunciation: decelerate