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).
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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