Definition of base jump in US English:

base jump

(also BASE jump)

noun

  • A parachute jump from a fixed point, typically a high building or promontory, rather than an aircraft.

    • ‘He has completed 2,000 skydives and 1,400 BASE jumps.’
    • ‘Additionally, he would have had to skydive another 30 to 40 times to get the experience necessary to base jump.’
    • ‘I've done more than 1,000 BASE jumps and 2,000 skydives now and every time I walk up to the edge of whatever the object is, I'm nervous.’
    • ‘Most base jumps are actually illegal so your best bet is probably the 25th annual Bridge Day in West Virginia.’
    • ‘Roland died in hospital in Canberra last Friday from head injuries he'd sustained during a base jump off a skyscraper in Shanghai earlier this month.’
    • ‘The truly foolish can take part in the annual base jump from the Petronas Twin Towers, which, at 1,483 ft high, combine to take the title of the world's second-tallest building.’
    • ‘The feeling in the sky is a little frightening although I had experienced about 170 BASE jumps.’
    • ‘‘The jumping show is our second BASE jump from a real building,’ Hu said.’
    • ‘A small core of adventurers are still attempting bold explorations - first ascents and descents, virgin BASE jumps, and mammoth waves - where the risks are truly unknown and death is a real possibility.’
    • ‘To date, more than 80 people have died attempting base jumps across the world.’
    • ‘Approximately 1 in 1,000 BASE jumps ends in death.’
    • ‘Nigel and Brent from First Light Travel suggest a rat-line / base jump from the Sky Tower.’
    • ‘These guys sew wings to their suit and base jump.’
    • ‘He is a former sky surfing champion and a member of the first team to incorporate acrobatic stunts in a BASE jump.’

verb

[no object]often as noun base jumping
  • Perform a base jump.

    • ‘I would rather base jump off a two-story building than relive a single moment of high school.’
    • ‘The desire to fly is natural in human kind, and while many defy gravity by base jumping, skydiving, and bungee jumping, others prefer to keep their feet firmly on the ground until something a little less frightening comes along.’
    • ‘Once a year, on the third Saturday in October("Bridge Day"), permission to BASE jump has explicitly been granted at the New River Gorge Bridge in Fayetteville, West Virginia.’
    • ‘‘You know, Lynnie, we could base-jump from this ledge,’ he said.’
    • ‘MTV Sports was planning a 30 minute documentary about a student BASE jumper going through the steps of learning how to BASE jump.’

Origin

1980s: base from b uilding, a ntenna-tower, s pan, e arth (denoting the types of structure used).