accelerations

/AE0 K S EH0 L ER0 EY1 SH AH0 N Z/
noun
  1. 1

    The act of accelerating, or the state of being accelerated; increase of motion or action; as opposed to retardation or deceleration.

    โ€œa falling body moves toward the earth with an acceleration of velocityโ€

  2. 2

    The amount by which a speed or velocity increases (and so a scalar quantity or a vector quantity).

    โ€œThe boosters produce an acceleration of 20 metres per second per second.โ€

  3. 3

    The change of velocity with respect to time (can include deceleration or changing direction).

  4. 4

    The advancement of students at a rate that places them ahead of where they would be in the regular school curriculum.

Source: https://en.wiktionary.org/wiki/acceleration, https://en.wiktionary.org/wiki/accelerations