skydiving

/S K AY1 D AY0 V IH0 NG/
verb
  1. 1

    To be in freefall after jumping from an aircraft and landing safely by deploying a parachute.

noun
  1. 1

    The practice of performing acrobatic movements during the freefall phase of a parachute jump.

Source: https://en.wiktionary.org/wiki/skydive, https://en.wiktionary.org/wiki/skydiving