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Longman Dictionary of Contemporary English
long jump
noun
EXAMPLES FROM CORPUS
▪ But agile he isn't; witness this rather half-hearted attempt at the long jump.
▪ Carl Lewis has done it in the 100 and 200 meters, tossing in the long jump for good measure.
▪ Ewry also took the standing long jump at 11-4 and the standing triple jump with a whopping 37-7.
▪ He dabbled in the long jump until the age of twenty-four and then decided to switch to the sprints.
▪ I hurt my foot in the last round of the long jump.
▪ They will also clash in the senior women's long jump and the shot.
▪ This is one country where he never was going to grab the gold medal in the long jump.
▪ Was it Carl Lewis falling prostrate after his gold medal long jump?
Wiktionary
long jump

n. An athletics field event where one has jump as far as possible, after taking a run-up.

WordNet
long jump
  1. n. a competition that involves jumping as far as possible from a running start [syn: broad jump]

  2. the act of jumping as far as possible from a running start [syn: broad jump]

Wikipedia
Long jump

The long jump (historically called the broad jump) is a track and field event in which athletes combine speed, strength, and agility in an attempt to leap as far as possible from a take off point. Along with the triple jump, the two events that measure jumping for distance as a group are referred to as the "horizontal jumps." This event has a history in the Ancient Olympic Games and has been a modern Olympic event for men since the first Olympics in 1896 and for women since 1948.