2. Noun. The front-dive pike, in which the body folds and unfolds. ¹
3. Noun. (colloquial) A semi-trailer truck accident in which the vehicle mimics the closing of a jack-knife. ¹
4. Noun. (statistics) (alternative spelling of jackknife) ¹
5. Verb. To fold in the middle, as a jackknife does. ¹
6. Verb. (colloquial) To cause a semi-trailer truck to fold like a jackknife in a traffic accident. ¹
¹ Source: wiktionary.com
Lexicographical Neighbors of Jack-knife
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