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WordReference Random House Learner's Dictionary of American English © 2024de•cel•er•ate /diˈsɛləˌreɪt/USA pronunciation v., -at•ed, -at•ing. - Mechanicsto (cause to) slow down or decrease the speed of: [no obj]:The car decelerated to a stop.[ ~ + obj]:He decelerated the truck.
- to slow the rate of increase of: [no obj]:with inflation finally decelerating.[ ~ + obj]:efforts to decelerate inflation.
de•cel•er•a•tion /diˌsɛləˈreɪʃən/USA pronunciation n. [uncountable]the slow deceleration down to subsonic speed. de•cel•er•a•tor, n. [countable]a decelerator to inflation.See -celer-. WordReference Random House Unabridged Dictionary of American English © 2024de•cel•er•ate (dē sel′ə rāt′),USA pronunciation v., -at•ed, -at•ing. v.t. - Mechanicsto decrease the velocity of:He decelerates the bobsled when he nears a curve.
- to slow the rate of increase of:efforts to decelerate inflation.
v.i. - Mechanicsto slow down:The plane decelerated just before landing.
- de- + (ac)celerate 1895–1900
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