Definitions for jack-knife
This page provides all possible meanings and translations of the word jack-knife
A compact folding knife.
He kept a jack-knife in his pocket for various tasks.
The front-dive pike, in which the body folds and unfolds.
It took me hundreds of dives to master even the simple jackknife
To fold in the middle, as a jackknife does.
The cat jackknifed in the air and landed gracefully on its feet.
To cause a semi-trailer truck to fold like a jackknife in a traffic accident.
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