| 释义 |
WordReference Random House Unabridged Dictionary of American English © 2024ac•cel•er•a•tion (ak sel′ə rā′shən),USA pronunciation n. - the act of accelerating;
increase of speed or velocity. - a change in velocity.
- Mechanicsthe time rate of change of velocity with respect to magnitude or direction;
the derivative of velocity with respect to time.
- Latin accelerātiōn- (stem of accelerātiō). See accelerate, -ion
- 1525–35
Collins Concise English Dictionary © HarperCollins Publishers:: acceleration /ækˌsɛləˈreɪʃən/ n - the act of accelerating or the state of being accelerated
- the rate of increase of speed or the rate of change of velocity
- the power to accelerate
ac•cel•er•ate /ækˈsɛləˌreɪt/USA pronunciation v., -at•ed, -at•ing. - to (cause to) develop, progress, or advance faster: [no object]The unemployment rate accelerated.[~ + object]Those policies accelerated unemployment.
- to increase the speed (of): [~ + object]The driver accelerated the car.[no object]The car accelerated.
- to hasten the occurrence of:[~ + object]The economic policies accelerated the recession.
ac•cel•er•a•tion /ækˌsɛləˈreɪʃən/USA pronunciation n. [uncountable]See -celer-. WordReference Random House Unabridged Dictionary of American English © 2024ac•cel•er•ate (ak sel′ə rāt′),USA pronunciation v., -at•ed, -at•ing. v.t. - to cause faster or greater activity, development, progress, advancement, etc., in:to accelerate economic growth.
- to hasten the occurrence of:to accelerate the fall of a government.
- Mechanicsto change the velocity of (a body) or the rate of (motion);
cause to undergo acceleration. - to reduce the time required for (a course of study) by intensifying the work, eliminating detail, etc.
v.i. - to move or go faster;
increase in speed. - to progress or develop faster.
- Latin accelerātus speeded up (past participle of accelerāre), equivalent. to ac- ac- + celer swift + -ātus -ate1
- 1515–25
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