jackknife - meaning and definition. What is jackknife
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What (who) is jackknife - definition

WIKIMEDIA DISAMBIGUATION PAGE
Jack-knife; Jack knife; Jackknife (disambiguation)

Jackknife         
·noun A large, strong clasp knife for the pocket; a pocket knife.
jackknife         
¦ noun (plural jackknives)
1. a large knife with a folding blade.
2. a dive in which the body is bent at the waist and then straightened.
¦ verb (jackknifes, jackknifing, jackknifed)
1. move (one's body) into a bent or doubled-up position.
(of a diver) perform a jackknife.
2. (of an articulated vehicle) bend into a V-shape in an uncontrolled skidding movement.
jackknife         

Wikipedia

Jackknife

Jackknife may refer to:

  • Pocket knife or jackknife, a compact, foldable knife
  • Jackknife Bar, Portland, Oregon, U.S.
  • Jackknifing, a type of crash with articulated vehicle combinations
Examples of use of jackknife
1. AM SAN ANTONIO –– A bone–rattling blast of sleet and snow kept Texas and Oklahoma residents shivering in its icy grip, while a blizzard north of Los Angeles caused big–rigs to jackknife.
2. Thursday January 18, 2007 12:31 PM AP Photo OKMR101 By MICHELLE ROBERTS Associated Press Writer SAN ANTONIO (AP) – A bone–rattling blast of sleet and snow kept Texas and Oklahoma residents shivering in its icy grip, while a blizzard north of Los Angeles caused big–rigs to jackknife.
3. Thursday January 18, 2007 12:16 PM AP Photo OKMR103, OKMR101, OHCLE101, OKMR104 By MICHELLE ROBERTS Associated Press Writer SAN ANTONIO (AP) – A bone–rattling blast of sleet and snow kept Texas and Oklahoma residents shivering in its icy grip, while a blizzard north of Los Angeles caused big–rigs to jackknife.
4. "You have to start by steering in the opposite direction you want it to go, otherwise it will just jackknife, blocking the beautiful medieval town centre to all traffic for many long, excruciating minutes," he says with the bitter voice of experience.
5. "Five or six inches of ice doesn‘t just fall from the sky in a lump," said Elwell, questioning why Pennsylvania Department of Transportation crews were unable to keep up with snow removal and avoid the accidents that caused tractor–trailers to jackknife in both the eastbound and westbound lanes.