Definition of jack-knife:
"He kept a jack-knife in his pocket for various tasks."
°The front-dive
pike, in which the body folds and unfolds.
°To fold in the middle, as a jackknife does.
°(colloquial) To cause a semi-trailer truck to
fold like a jackknife in a traffic accident.
"Before I knew what was happening, I'd jack-knifed the rig like nobody's business."
Definition of jack-knife:
"He kept a jack-knife in his pocket for various tasks."
°The front-dive
pike, in which the body folds and unfolds.
°To fold in the middle, as a jackknife does.
°(colloquial) To cause a semi-trailer truck to
fold like a jackknife in a traffic accident.
"Before I knew what was happening, I'd jack-knifed the rig like nobody's business."