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

The Sound Of Not Stopping For Bebe Rexha What followed was not a pause, but acceleration. —Desjah Altvater, Forbes.com, 11 June 2026

The acceleration fires the propellant into space as a spray (hence the name). —Elizabeth Howell, Space.com, 9 June 2026

Microsoft Touchscreen Laptop Deal The Microsoft Surface laptop accelerates productivity by packing a 12-core Snapdragon X Elite processor with a rapid NPU for native AI acceleration. —Juhi Wadia, PC Magazine, 9 June 2026

Even moderate helicopter acceleration caused the massive structure to pitch by more than 20 degrees. —Georgina Jedikovska, Interesting Engineering, 9 June 2026

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

Rhymes for acceleration

• abbreviation
• abomination
• accentuation
• accommodation
• accreditation
• acculturation
• accumulation
• acetylation
• adjudication
• administration
• adulteration
• affiliation

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