acceleration.
The act of accelerating, or the state of being accelerated; increase of motion or action; as opposed to retardation or deceleration.
Meaning & usage
The act of accelerating, or the state of being accelerated; increase of motion or action; as opposed to retardation or deceleration.
A falling body moves toward the earth with an acceleration of velocity.
The amount by which a speed or velocity increases (and so a scalar quantity or a vector quantity).
The boosters produce an acceleration of 20 metres per second per second.
The change of velocity with respect to time (can include deceleration or changing direction).
The advancement of students at a rate that places them ahead of where they would be in the regular school curriculum.
Where this word comes from
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.
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Definitions, grammatical labels, IPA, etymology and examples: Wiktionary contributors, extracted by Kaikki / Wiktextract. Adapted under CC BY-SA 4.0. Selected fields and authored examples are shown; third-party quotations and audio are omitted. See contributor history.
Last enriched 2026-09-10. Definitions are in English. Romanizations are shown when supplied by the source; syllable estimates are omitted for unsupported scripts.