Longman Dictionary of Contemporary English
Wiktionary
n. An athletics field event where one has jump as far as possible, after taking a run-up.
WordNet
n. a competition that involves jumping as far as possible from a running start [syn: broad jump]
the act of jumping as far as possible from a running start [syn: broad jump]
Wikipedia
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.