jackknife
/JH AE1 K N AY0 F/- 1
A compact folding knife.
“He kept a jack-knife in his pocket for various tasks.”
- 2
The front-dive pike, in which the body folds and unfolds.
“It took me hundreds of dives to master even the simple jackknife”
- 3
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.”
- 1
To fold in the middle, as a jackknife does.
“The cat jackknifed in the air and landed gracefully on its feet.”
- 2
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 truck.”
- 1
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.
Synonyms
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Source: https://en.wiktionary.org/wiki/jack-knife, https://en.wiktionary.org/wiki/jackknife