Definition of accelerate in English:



  • 1(especially of a vehicle) begin to move more quickly.

    ‘the car accelerated towards her’
    • ‘Amazingly both cars are as fast as each other, with the diesel car accelerating just a bit quicker than the petrol.’
    • ‘Then the airplane starts accelerating rapidly and people begin panicking.’
    • ‘The Escort accelerated towards Glasgow, and as the midnight traffic dwindled, the hitcher knew the game was up.’
    • ‘As the ship accelerated, chunks of the back end began to fly off and disintegrate.’
    • ‘She gazed back towards the bus stop as the East route vehicle accelerated away.’
    • ‘A unique feature of VTM - 4 is that it drives the rear wheels whenever the vehicle accelerates, even on dry pavement.’
    • ‘The test commenced with the vehicle accelerating under normal conditions from a standing position to the testing speed.’
    • ‘They heard the roar of the engines and squealing of tires as the cars accelerated quickly from Ottawa Street.’
    • ‘I can't believe how fast these cars accelerate out of the corner.’
    • ‘From a standing start, the car accelerated smoothly and quickly.’
    • ‘The airplane accelerates very quickly in the dive and when seen from the ground appears extremely fast.’
    • ‘What the figures don't tell you, though, is just how quickly this little car accelerates in the midrange.’
    • ‘The average F1 car can accelerate faster than most other race cars, aside from drag racing and rally cars that is.’
    • ‘My bike accelerates faster, though, and it's a lot more agile, and I have a clear picture in my head of the city grid for this section and a feel for the traffic rhythms.’
    • ‘In Europe we talk about style and how fast a car accelerates.’
    • ‘The vehicle accelerates from 0 to 60 mph in roughly 16 seconds.’
    • ‘They watched as the silvery vehicle accelerated into the fast lane and then disappeared in a bright flash.’
    • ‘Once the countdown reached zero the cart began to move, accelerating rather rapidly.’
    • ‘The vehicle accelerated in a sudden thrust, swerving about out of control.’
    • ‘The helpless ship accelerated for a few moments and then began to slow down, eventually coming to a standstill.’
    1. 1.1 Increase in rate, amount, or extent.
      ‘inflation started to accelerate’
      with object ‘the key question is whether stress accelerates ageing’
      • ‘As you can see, not only is the total increasing, the rate of that increase also has been accelerating steadily for the past three years.’
      • ‘It may not have the highest percentage of population infected, but, frighteningly and tragically, its rate of increase is accelerating.’
      • ‘It's more of the same only faster and faster because the future's now coming at the speed of light and change is accelerating at an exponential rate.’
      • ‘Then, Spinella says, the shift into hybrids and smaller vehicles would accelerate.’
      • ‘This contribution is expected to increase as melting rates accelerate, though ultimately the added runoff is predicted to disappear as glaciers decline many decades from now.’
      • ‘If they rise because economic growth appears to be accelerating, the increase will be harmless.’
      • ‘Observations of change over the past century indicate that technology is evolving exponentially, which means change is accelerating or the rate of change is increasing.’
      • ‘The government wants to halt this trend, which is accelerating at an alarming rate, and is calling on employers to give the 50-plus age - group a fair chance of employment right up to retirement.’
      • ‘Biotechnology will continue to advance and its rate of advance will accelerate.’
      • ‘The shifting of language in communities may in fact be accelerating with increased mobility and technological advances.’
      • ‘The need for water investment keeps inexorably increasing and tends to accelerate as the deterioration of these systems advance.’
      • ‘Cable operators and other carriers are adopting DWDM at a slower rate - a rate that is accelerating, but nowhere near the activity of the telcos.’
      • ‘If the economy improves, inflation accelerates and interest rates rise, your Savings Bond rates will go up, too.’
      • ‘All of the northern regions of England and Wales showed prices rising, with the pace of increase accelerating in Yorkshire and the Humber for the first time since last October.’
      • ‘These adverse inflationary monetary events are accelerating and can only increase the weight bearing down on the MCDI.’
      • ‘But it still leaves unexplained why the rate of house price increases should be accelerating at all, and how reliable and sustainable this acceleration is.’
      • ‘Throughout 2003 the monthly increases in the unemployment rate accelerated and the average number of hours worked declined.’
      • ‘Ponting and Martyn settled in after tea to appear increasingly comfortable, with the scoring rate accelerating in direct comparison with the perceived comfort of the batsmen.’
      • ‘Within the core CPI, shelter costs are accelerating at an alarming rate, rising 0.5 percent in May and June.’
      • ‘The rate of advance of biotech is likely to accelerate to such an extent that many people who are alive right now will live to see aging become at first partially reversible.’
      speed up, hurry up, get faster, move faster, go faster, drive faster, get a move on, put on a spurt, open it up, gain momentum, increase speed, pick up speed, gather speed
      increase, rise, go up, advance, leap, surge, speed up, escalate, spiral, get worse
      hasten, expedite, precipitate, speed, speed up, hurry up, make faster, step up, advance, further, forward, promote, boost, give a boost to, stimulate, spur on
      View synonyms
    2. 1.2Physics Undergo a change in velocity.
      ‘an accelerating electron radiates off some of its energy’
      • ‘In a strong electric field, free electrons can be accelerated onto its inner surface.’
      • ‘Why is it easier to accelerate an electron to a speed that is close to the speed of light, compared to accelerating a proton to the same speed?’
      • ‘The source is a gyrotron, a device that accelerates electrons through a strong magnetic field to produce microwaves.’
      • ‘Why is that electrons radiate electromagnetic energy when they are accelerated?’
      • ‘According to Al Smith, much current research is focused on the use of lasers to accelerate protons, rather than using existing cyclotron and synchrotron sources.’
      • ‘The synchrotron can accelerate electrons from a mere walking pace up to almost the speed of light.’
      • ‘In this model the gamma rays are emitted as synchrotron radiation by electrons that are accelerated to much lower energies.’
      • ‘Imaging systems for EPL incorporate accelerated electron beams and require high-sensitivity resists.’
      • ‘These electrons accelerate in the electric field of the wake.’
      • ‘X rays emerge when the electrons, accelerated by a strong electric field, slam into a tungsten target.’
      • ‘These electrons are further accelerated to strike a fluorescent screen, where the effects can easily be seen by the eyes.’
      • ‘These electrons are then accelerated by a static electric field towards a fluorescent screen.’
      • ‘Most of the northern lights we see originate in the electrons accelerated into the ionosphere.’
      • ‘The principle of the cyclotron fails as particles accelerate close to the speed of light.’
      • ‘An ECR produces ions by first accelerating electrons.’
      • ‘Most of the energy invested in accelerating the electrons is recouped in the cavities as the returning beam decelerates.’
      • ‘A sufficiently strong electric field can further accelerate these electrons.’
      • ‘This action causes the solar atmosphere to sizzle with high-energy X-rays and gamma rays and accelerate proton and electron particles into the solar system.’
      • ‘The electron beam gun emits electrons, accelerates the beam of electrons, and focuses it on the work piece.’
      • ‘These forces of attraction and repulsion provide a kind of ‘kick’ that accelerates the electron in a forward direction.’


Early 16th century (in the sense ‘hasten the occurrence of’): from Latin accelerat- ‘hastened’, from the verb accelerare, from ad- ‘towards’ + celer ‘swift’.