noun · 7 senses · updated from the 2026-07-25 local source snapshot
Definitions and examples are grouped by meaning. Pronunciation, history, word forms, translations, descendants, synonyms, antonyms, derived terms, and related words appear whenever the source provides them.
Sound
Pronunciation
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əksĕlərā'shən
/əkˌsɛl.əˈɹeɪ.ʃən/
/ækˌsɛl.əˈɹeɪ.ʃən/
/ɪkˌsɛl.əˈɹeɪ.ʃən/
US:Recorded audio is listed in the source snapshot.
rhymes with -eɪʃən
CMU ARPABET:AE2 K S EH2 L ER0 EY1 SH AH0 N
Digits mark lexical stress: 1 primary, 2 secondary, 0 unstressed.
1
noun
Meaning 1
The act of accelerating, or the state of being accelerated; increase of motion or action; as opposed to retardation or deceleration.
Definition source: English Wiktionary via Wiktextract
Usage: uncountable
Examples
A falling body moves toward the earth with an acceleration of velocity.
Meaning relationships
Synonyms: none provided
Antonyms: none provided
2
noun
Meaning 2
The amount by which a speed or velocity increases (and so a scalar quantity or a vector quantity).
Definition source: English Wiktionary via Wiktextract
Usage: countable
Examples
The boosters produce an acceleration of 20 metres per second per second.
Meaning relationships
Synonyms: none provided
Antonyms: none provided
3
noun
Meaning 3
The change of velocity with respect to time (can include deceleration or changing direction).
Definition source: English Wiktionary via Wiktextract
Etymology tree Proto-Indo-European *h2éd Proto-Italic *ad Proto-Italic *ad- Latin ad- Proto-Indo-European *kel-der. Latin celer Proto-Indo-European *-h2 Proto-Indo-European *-éh2 Proto-Indo-European *-yéti Proto-Indo-European *-eh2yéti Proto-Indo-European *-h2tiinflu. Proto-Italic *-ājō Proto-Italic *-āō Latin -ō Latin celerō Latin accelerō Proto-Indo-European *-tis Proto-Indo-European *-Hō Proto-Indo-European *-tiHō Proto-Italic *-tiō Latin -tiō Latin accelerātiōder. English acceleration First attested in 1531. From French accélération or more likely directly from Latin accelerātiō (“a hastening, acceleration”). Equivalent to accelerate + -ion.
Across languages
Translations
169 source translations are retained for this English entry.
Armenian:
արագացում
(aragacʻum)
— act or state
Belarusian:
паскарэ́нне
(paskarénnje)
— act or state
Bulgarian:
ускоря́ване
(uskorjávane)
— act or state
Bulgarian:
акселера́ция
(akselerácija)
— act or state
Bulgarian:
ускоре́ние
(uskorénie)
— act or state
Catalan:
acceleració
— act or state
Chinese Mandarin:
加速
(jiāsù)
— act or state
Czech:
zrychlení
— act or state
Danish:
acceleration
— act or state
Dutch:
versnelling
— act or state
Dutch:
acceleratie
— act or state
Esperanto:
akcelo
— act or state
Finnish:
kiihdytys
— act or state
French:
accélération
— act or state
Galician:
aceleración
— act or state
German:
Beschleunigung
— act or state
German:
Akzeleration
— act or state
Greek:
επιτάχυνση
(epitáchynsi)
— act or state
Hebrew:
האצה
(he'atza)
— act or state
Hungarian:
gyorsulás
— act or state
Interlingua:
acceleration
— act or state
Italian:
accelerazione
— act or state
Japanese:
加速
(kasoku)
— act or state
Korean:
가속
(gasok)
— act or state
Latin:
accelerātiō
— act or state
Lithuanian:
pagreitis
— act or state
Luxembourgish:
Acceleratioun
— act or state
Macedonian:
забрзување
(zabrzuvanje)
— act or state
Malayalam:
ത്വരണം
(tvaraṇaṁ)
— act or state
Norwegian Bokmål:
akselerasjon
— act or state
Norwegian Nynorsk:
akselerasjon
— act or state
Persian:
شتاب
(šetâb)
— act or state
Middle Persian:
𐭠𐭥𐭮𐭲𐭠𐭯𐭮𐭭𐭭
— act or state
Polish:
przyspieszenie
— act or state
Polish:
akceleracja
— act or state
Portuguese:
aceleração
— act or state
Romanian:
accelerație
— act or state
Romanian:
accelerare
— act or state
Russian:
ускоре́ние
(uskorénije)
— act or state
Russian:
разго́н
(razgón)
— act or state
Serbo-Croatian:
akcelerácija
— act or state
Serbo-Croatian:
ubrzánje
— act or state
Spanish:
aceleración
— act or state
Spanish:
aceleramiento
— act or state
Spanish:
acceleración
— act or state
Swahili:
mchapuko
— act or state
Swedish:
acceleration
— act or state
Tagalog:
darasig
— act or state
Ukrainian:
приско́рення
(pryskórennja)
— act or state
Venetan:
acelerasion
— act or state
Armenian:
արագացում
(aragacʻum)
— amount
Bulgarian:
ускоре́ние
(uskorénie)
— amount
Catalan:
acceleració
— amount
Chinese Mandarin:
加速度
(jiāsùdù)
— amount
Czech:
zrychlení
— amount
Dutch:
versnelling
— amount
Dutch:
acceleratie
— amount
Esperanto:
akcelo
— amount
Finnish:
kiihtyvyys
— amount
French:
accélération
— amount
German:
Beschleunigung
— amount
German:
Akzeleration
— amount
Greek:
επιτάχυνση
(epitáchynsi)
— amount
Hebrew:
תאוצה
(teutza)
— amount
Italian:
accelerazione
— amount
Japanese:
加速度
(kasokudo)
— amount
Malay:
pecutan
— amount
Polish:
przyspieszenie
— amount
Portuguese:
aceleração
— amount
Russian:
ускоре́ние
(uskorénije)
— amount
Serbo-Croatian:
akcelerácija
— amount
Serbo-Croatian:
ubrzánje
— amount
Swedish:
acceleration
— amount
Tagalog:
darasig
— amount
Afrikaans:
versnelling
— change of velocity with respect to time
Amharic:
ፍጥንጥነት
(fəṭnəṭnät)
— change of velocity with respect to time
Arabic:
تَسَارُع
(tasāruʕ)
— change of velocity with respect to time
Aragonese:
aceleración
— change of velocity with respect to time
Armenian:
արագացում
(aragacʻum)
— change of velocity with respect to time
Assamese:
ত্বৰণ
(toron)
— change of velocity with respect to time
Asturian:
aceleración
— change of velocity with respect to time
Azerbaijani:
təcil
— change of velocity with respect to time
Bashkir:
тиҙләнеш
(tiźləneş)
— change of velocity with respect to time
Basque:
azelerazio
— change of velocity with respect to time
Belarusian:
паскарэнне
(paskarennje)
— change of velocity with respect to time
Bengali:
ত্বরণ
(toron)
— change of velocity with respect to time
Bulgarian:
ускоре́ние
(uskorénie)
— change of velocity with respect to time
Burmese:
အရှိန်
(a.hrin)
— change of velocity with respect to time
Catalan:
acceleració
— change of velocity with respect to time
Cebuano:
pagpatulin
— change of velocity with respect to time
Chinese Mandarin:
加速度
(jiāsùdù)
— change of velocity with respect to time
Czech:
zrychlení
— change of velocity with respect to time
Czech:
akcelerace
— change of velocity with respect to time
Danish:
acceleration
— change of velocity with respect to time
Dutch:
versnelling
— change of velocity with respect to time
Dutch:
acceleratie
— change of velocity with respect to time
Esperanto:
akcelo
— change of velocity with respect to time
Estonian:
kiirendus
— change of velocity with respect to time
Finnish:
kiihtyvyys
— change of velocity with respect to time
French:
accélération
— change of velocity with respect to time
West-Frisian:
fersnelling
— change of velocity with respect to time
Galician:
aceleración
— change of velocity with respect to time
Georgian:
აჩქარება
(ačkareba)
— change of velocity with respect to time
German:
Beschleunigung
— change of velocity with respect to time
German:
Akzeleration
— change of velocity with respect to time
Greek:
επιτάχυνση
(epitáchynsi)
— change of velocity with respect to time
Haitian Creole:
akselerasyon
— change of velocity with respect to time
Hebrew:
תאוצה
— change of velocity with respect to time
Hindi:
त्वरण
(tvaraṇ)
— change of velocity with respect to time
Hungarian:
gyorsulás
— change of velocity with respect to time
Icelandic:
hröðun
— change of velocity with respect to time
Indonesian:
percepatan
— change of velocity with respect to time
Indonesian:
akselerasi
— change of velocity with respect to time
Irish:
luasghéarú
— change of velocity with respect to time
Italian:
accelerazione
— change of velocity with respect to time
Japanese:
加速度
(kasokudo)
— change of velocity with respect to time
Karachay-Balkar:
терклениу
(terkleniu)
— change of velocity with respect to time
Kazakh:
үдеу
(üdeu)
— change of velocity with respect to time
Khmer:
សំទុះ
(sɑmtuh)
— change of velocity with respect to time
Korean:
가속도
(gasokdo)
— change of velocity with respect to time
Latin:
acceleratio
— change of velocity with respect to time
Latvian:
paātrinājums
— change of velocity with respect to time
Lithuanian:
pagreitis
— change of velocity with respect to time
Macedonian:
забрзување
(zabrzuvanje)
— change of velocity with respect to time
Malay:
pemecutan
— change of velocity with respect to time
Malayalam:
ത്വരണം
(tvaraṇaṁ)
— change of velocity with respect to time
Manx:
bieauaghey
— change of velocity with respect to time
Marathi:
त्वरण
(tvaraṇ)
— change of velocity with respect to time
Mongolian:
хурдатгал
(xurdatgal)
— change of velocity with respect to time
Neapolitan:
accëllërazion
— change of velocity with respect to time
Nepali:
प्रवेग
(praveg)
— change of velocity with respect to time
Newar:
प्रवेग
(prawega)
— change of velocity with respect to time
Norwegian Bokmål:
akselerasjon
— change of velocity with respect to time
Norwegian Nynorsk:
akselerasjon
— change of velocity with respect to time
Occitan:
acceleracion
— change of velocity with respect to time
Persian:
شتاب
(šetâb)
— change of velocity with respect to time
Polish:
przyspieszenie
— change of velocity with respect to time
Portuguese:
aceleração
— change of velocity with respect to time
Punjabi:
ਪ੍ਰਵੇਗ
(prveg)
— change of velocity with respect to time
Romanian:
accelerație
— change of velocity with respect to time
Russian:
ускоре́ние
(uskorénije)
— change of velocity with respect to time
Serbo-Croatian:
akcelerácija
— change of velocity with respect to time
Serbo-Croatian:
ubrzánje
— change of velocity with respect to time
Serbo-Croatian:
акцелерација
— change of velocity with respect to time
Sicilian:
accilirazzioni
— change of velocity with respect to time
Silesian:
szwůng
— change of velocity with respect to time
Sinhalese:
ත්වරණය
(twaraṇaya)
— change of velocity with respect to time
Slovak:
zrýchlenie
— change of velocity with respect to time
Slovene:
pospešek
— change of velocity with respect to time
Spanish:
aceleración
— change of velocity with respect to time
Spanish:
acceleración
— change of velocity with respect to time
Sundanese:
percepetan
— change of velocity with respect to time
Sundanese:
akselerasi
— change of velocity with respect to time
Swedish:
acceleration
— change of velocity with respect to time
Tagalog:
darasig
— change of velocity with respect to time
Tagalog:
akselerasyon
— change of velocity with respect to time
Tamil:
முடுக்கம்
(muṭukkam)
— change of velocity with respect to time
Tatar:
тизләнеш
(tizläneş)
— change of velocity with respect to time
Telugu:
త్వరణము
(tvaraṇamu)
— change of velocity with respect to time
Thai:
ความเร่ง
(kwaam-rêng)
— change of velocity with respect to time
Turkish:
ivme
— change of velocity with respect to time
Turkish:
hızlanma
— change of velocity with respect to time
Ukrainian:
прискорення
(pryskorennja)
— change of velocity with respect to time
Urdu:
اسراع
(israa)
— change of velocity with respect to time
Uzbek:
tezlanish
— change of velocity with respect to time
Venetan:
acelerasion
— change of velocity with respect to time
Vietnamese:
gia tốc
— change of velocity with respect to time
Welsh:
cyflymiad
— change of velocity with respect to time