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BASE jump

or B.A.S.E. jumpor base jump

[beys]
noun
  1. a parachute jump from the top of a building, bridge, cliff, etc., usually at a height of 1,000 feet (305 meters) or less.
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Origin of BASE jump

1980–85; B(uilding) + A(ntenna) (tower) + S(pan)1 + E(arth) + jump
Related formsBASE jumper, nounBASE jumping, noun
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018