English Explanatory Dictionary

acceleration

English dictionary entry

Meanings

noun
  1. The act of accelerating, or the state of being accelerated; increase of motion or action; as opposed to retardation or deceleration.
  2. The amount by which a speed or velocity increases (and so a scalar quantity or a vector quantity).
  3. The change of velocity with respect to time (can include deceleration or changing direction).
  4. The advancement of students at a rate that places them ahead of where they would be in the regular school curriculum.

Pronunciation

əksĕlərā'shən /əkˌsɛl.əˈɹeɪ.ʃən/ /ækˌsɛl.əˈɹeɪ.ʃən/ /ɪkˌsɛl.əˈɹeɪ.ʃən/ En-us-acceleration.ogg

Word forms

acceleration accelerations acc. a.

Etymology

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-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.

Antonyms

deceleration retardation

Related words

displacement velocity jerk

Derived words

accelerational acceleration clause accelerationism accelerationist acceleration lane acceleration of freefall acceleration of gravity acceleration principle angular acceleration antiacceleration autoacceleration cardioacceleration celeration centripetal acceleration deacceleration four-acceleration hardware acceleration microacceleration nonacceleration overacceleration Planck acceleration plasma acceleration plasma wakefield acceleration postacceleration proper acceleration quadriacceleration reacceleration underacceleration
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