acceleration

noun

ac·​cel·​er·​a·​tion ik-ˌse-lə-ˈrā-shən 

(ˌ)ak-

1

a

: the act or process of moving faster or happening more quickly : the act or process of accelerating

rapid acceleration

the acceleration of economic growth

b

: ability to accelerate

a car with good acceleration

2

physics : the rate of change of velocity with respect to time

broadly : change of velocity

Examples of acceleration in a Sentence

The car delivers quick acceleration.

There has been some acceleration in economic growth.

There has been an acceleration in economic growth.

Recent Examples on the Web

Rivian learned from the original vehicles that having identical motors front and rear was not optimal, because the front wheels couldn’t use all of the available torque and the rears needed more for catapult-launch acceleration. —Dan Carney, Popular Science, 12 June 2024

Some of the early predictions that the Inflation Reduction Act would help slash U.S. greenhouse gas emissions roughly 40 percent below 2005 levels by 2030 depended on a rapid acceleration of both solar and wind power this decade. —Brad Plumer, New York Times, 3 June 2024

Modern EVs are measured by range and acceleration, two qualities in which the Model Y highlights. —Eric D. Lawrence, Detroit Free Press, 31 May 2024

The permanent-magnet, bar-wound front motor provides most of the motivation, while the rear induction motor with no magnet can either contribute to traction and acceleration or disconnect to maximize range. —Michael Teo Van Runkle, Ars Technica, 30 May 2024

Word History

Etymology

borrowed from Anglo-French & Latin; Anglo-French acceleratiun, borrowed from Latin accelerātiōn-, accelerātiō, from accelerāre "to accelerate" + -tiōn-, -tiō, suffix of action nouns

First Known Use

15th century, in the meaning defined at sense 1a

Phrases Containing acceleration

• acceleration of gravity
• acceleration principle
• angular acceleration

Kids Definition

acceleration

noun

ac·​cel·​er·​a·​tion ik-ˌsel-ə-ˈrā-shən 

ak-

1

: the act or process of accelerating : the state of being accelerated

2

: the rate of change of velocity with respect to time

also : change in velocity

Medical Definition

acceleration

noun

ac·​cel·​er·​a·​tion ik-ˌsel-ə-ˈrā-shən, (ˌ)ak- 

1

: the act or process of accelerating : the state of being accelerated

2

: change of velocity

also : the rate of this change

3

: advancement in mental growth or achievement beyond the average for one's age