jack-knife

listen to the pronunciation of jack-knife
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The front-dive pike, in which the body folds and unfolds

It took me hundreds of dives to master even the simple jackknife.

A semi-trailer truck accident in which the vehicle mimics the closing of a jack-knife

I have seen several jack-knives along that dangerous stretch of road.

Alternative spelling of jackknife
A compact folding knife

He kept a jack-knife in his pocket for various tasks.

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 like nobody's business.

To fold in the middle, as a jackknife does

The cat jackknifed in the air and landed gracefully on its feet.

If a truck that is in two parts jack-knifes, the back part swings around at a sharp angle to the front part in an uncontrolled way as the truck is moving. His vehicle jack-knifed, and crashed across all three lanes of the opposite carriageway. if a large vehicle with two parts jack-knifes, it slides out of control and the back part swings towards the front part
jackknife
Alternative spelling of jack-knife
jackknife
A resampling method that applies estimators to all subsamples that each omit a single different group (possibly of a single datapoint) of the original sample to provide a sample distribution of the estimate
jack knife
(noun) a knife with a blade that folds into its handle
jack knife
(noun) a dive in which you bend at the waist when you are in the air
jack knife
(verb) if a large vehicle with two parts jack-knifes, it slides out of control and the back part swings towards the front part. "The truck skidded on the ice and jack-knifed."
jack knife
knife which folds into the handle
jackknife
a large knife with one or more folding blades
jackknife
Articulation between the towing and towed vehicles (generally greater than 90 degrees) which may result in binding
jackknife
A large, strong clasp knife for the pocket; a pocket knife
jackknife
a dive in which the diver bends to touch the ankles before straightening out dive into the water bending the body at the waist at a right angle, like a jackknife
jackknife
A condition that can occur when either tractor, trailer, or tractor and trailer wheels lose traction and lateral vehicle stability cannot be maintained
jackknife
{i} large pocketknife whose blade folds into the handle; dive in which the diver doubles up in mid-air and then straightens out before entering the water
jackknife
{f} bend like a pocketknife, double up, bend sharply in half; do a jackknife dive
jackknife
dive into the water bending the body at the waist at a right angle, like a jackknife
jackknife
A condition existing in a truck or truck tractor trailer(s) combination when the longitudinal axis of the combination moves from a relatively straight line to one having one or more exaggerated angles on the order of 90&#t176; kingpin or pintle connections Usually occurs in connection with loss of traction while operating over-the-road or when maneuvering or backing in close quarters
jackknife
To place the trailer at a very sharp angle to the tractor
jackknife
a dive in which the diver bends to touch the ankles before straightening out
jackknife
A procedure that estimates standard errors of percentages and other statistics It is particularly suited to complex sample designs
jack-knife
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