jackknife Noun 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.
jackknife Verb Alternative spelling of jack-knife
jack-knife Noun A compact folding knife.
jack-knife Noun The front-dive pike, in which the body folds and unfolds.
jack-knife Noun A semi-trailer truck accident in which the vehicle mimics the closing of a jack-knife.
jack-knife Noun Alternative spelling of jackknife
jack-knife Verb To fold in the middle, as a jackknife does.
jack-knife Verb To cause a semi-trailer truck to fold like a jackknife in a traffic accident.