Definition of "jackknifed" []

• Simple past tense and past participle of jackknife. (verb)

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• "Michael thrashed his legs and jackknifed his body, just like the hooded man had done, but Angel and Jordan were too strong."
• "The man thrashed his legs and jackknifed his body, but the soldiers lifted him off the ground, raising him so high that his feet pedaled the air."
• "It would be best if I were caught in a situation like the two motorists who had been killed recently when a semitrailer jackknifed on the highway."