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Definition of Jackknife
1. Verb. Dive into the water bending the body at the waist at a right angle, like a jackknife.
2. Noun. A large knife with one or more folding blades.
3. Noun. A dive in which the diver bends to touch the ankles before straightening out.
Definition of Jackknife
1. n. A large, strong clasp knife for the pocket; a pocket knife.
Definition of Jackknife
1. Noun. (alternative spelling of jack-knife) ¹
2. Noun. (statistics) 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. ¹
3. Verb. (alternative spelling of jack-knife) ¹
¹ Source: wiktionary.com
Definition of Jackknife
1. [v -KNIFED, -KNIFING, -KNIFES] / [n -KNIVES]