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Word: jack-knife (lookup usage) (lookup stats)


Meaning:

Noun:

  • A compact folding knife.
  • colloquial A semi-trailer truck accident in which the vehicle mimics the closing of a jack-knife.
  • jackknife
  • The front-dive pike, in which the body folds and unfolds.

Source: Wiktionary | Src Info »

Verb:

  • colloquial To cause a semi-trailer truck to fold like a jackknife in a traffic accident.
  • To fold in the middle, as a jackknife does.

Source: Wiktionary | Src Info »