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Longman Dictionary of Contemporary English
decelerate
verb
EXAMPLES FROM CORPUS
▪ Alpha particles are just high-energy 4He nuclei; after decelerating and picking up electrons, they become atoms of 4He.
▪ An underpowered helicopter will rapidly decelerate as soon as you apply any control input and the model will come to a dead stop-probably inverted.
▪ Between the bow shock and the magnetopause the solar wind is greatly decelerated.
▪ I have an aggravating whine coming from my gearbox every time I decelerate in fourth gear.
▪ Only four steps are required to decelerate the motor, as the load torque contributes to the decelerating torque.
▪ Our flight continued to decelerate to about 70 knots.
▪ Steeply, noses high, the whole flight rapidly decelerated for the landing.
▪ Then, with a single powerful engine burn, the spacecraft can decelerate to a soft landing on the lunar surface.
The Collaborative International Dictionary
decelerate

decelerate \decelerate\ v. t. to cause to reduce speed. Opposite of accelerate.

Syn: slow down.

decelerate

decelerate \decelerate\ v. i. 1. 1 to reduce speed; as, The car decelerated. Opposite of accelerate.

Syn: slow, slow down, slow up, retard.

Douglas Harper's Etymology Dictionary
decelerate

1899, back-formation from deceleration. Related: Decelerated; decelerating.

Wiktionary
decelerate

vb. 1 to reduce the velocity of something 2 to reduce the rate of advancement of something, such as a disease 3 (context intransitive English) to go slower

WordNet
decelerate
  1. v. lose velocity; move more slowly; "The car decelerated" [syn: slow, slow down, slow up, retard] [ant: accelerate]

  2. reduce the speed of; "He slowed down the car" [syn: slow down] [ant: accelerate]

Usage examples of "decelerate".

With a rumble of displaced air, the Libra-class freighter broke through the high wisps of cloud, airfoil body providing lift to assist the engines as the freighter decelerated and turned to the strip heading from orbit.

I opened my wings wider to catch the blazing gust of light at the same instant the ergs on the Startree below folded the heliosphere matrix, bending the plasma stream back against Aenea and me, decelerating both of us rapidly but not painfully so.

There were eight light cruisers and twice that number of frigate and corvette analogs on his tail, and they were all traveling far too fast to intend decelerating anywhere near Eclipse.

The interior became cavelike as she stared uncomprehendingly at the now-blackened windshield, her right shoulder pressed up against the dashboard as the car decelerated.

There he stopped, decelerated and jaunted to the monastery airfield, half a mile distant.

He was decelerated, but the exhaustion of his body told him he had been under acceleration while he had been unconscious.

The cargo door thumped open, expelling a two-ton square of durasteel, and the blastboat decelerated and slammed her into the transparisteel dome, and she grabbed for the cannon triggers and pushed herself into the firing seat.

Luke decelerated as much as he dared with the skips coming behind them and locked down the trigger of his laser cannon, burning round after round into the interior of the cruiser.

Lando nosed down toward it and decelerated hard, and then there was nothing but durasteel hull in the forward viewport, and the two ships kissed particle shields hard enough to push the starferry into the Yuuzhan Vong tether ship.

The little knot of armed Tran and humans decelerated on its dark, windswept, western flank.

Just as he realized that their twisting triangle of chairs was going to crash into one of the tallest circular spires on the near end of that orbiting mountain, his chair pitched completely over and the forcefield squeezed the breath out of him as they decelerated hard enough to make his vision go from red to black and back to red again.

When the slam should have come, the door decelerated abruptly and closed with a soft, decisive, double click.

The delay, in the meantime, would not be dangerous with the EDS decelerating at fractional gravity.

Patek Georg when they were six hundred thousand klicks away and decelerating nicely.

The Destroyer had already altered its trajectory toward populated regions of the forest ring, but Den Soa broadcast the modulated graviton recordings while they were still decelerating, and the giant harvester responded with an indecipherable gravitonic rumble of its own and dutifully changed course toward a remote and unpopulated section of the ring.