jackknife

J8A1C3K5K5N1I1F4E1

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.

Similar
leave-one-outclasp knife
UncommonScrabble 29
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Meanings

nounjackknife (plural jackknives)

plural jackknives

  1. alternativeAlternative spelling of jack-knife.

    […] near it is a cluster of weapons of villanous aspect, comprising every thing from a Malayan creese to a sailor's jackknife or a Smith & Wesson revolver.

    1887, Julian Hawthorne, A Tragic Mystery: From the Diary of Inspector Byrnes, page 25
  2. mathematicsA 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: leave-one-out

verbjackknife (third-person singular simple present jackknifes, present participle jackknifing, simple past and past participle jackknifed)

present singular third person jackknifes · participle present jackknifing · participle past jackknifed · past jackknifed

  1. alternativeAlternative form of jack-knife.

Synonyms & antonyms

nounA 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.

Similar
leave-one-out

More synonyms by meaning

nouna large knife with one or more folding blades

Similar
clasp knife
Broader
pocketknifepocket knife
Also see
leave-one-out

Synonym sets from Open English WordNet, CC BY 4.0.

Translations

Polish jackknife
  • jackknifestatistics
Cite this entry
APA

jackknife. (n.d.). In WatkinsX Dictionary. Retrieved November 2, 2026, from https://dictionary.watkinsx.com/word/jackknife

MLA

“jackknife.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/jackknife. Accessed November 2, 2026.

Chicago

WatkinsX Dictionary, s.v. “jackknife,” accessed November 2, 2026, https://dictionary.watkinsx.com/word/jackknife.

Source: jackknife on Wiktionary, CC BY-SA 4.0.