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jackknife (diving)

Definition:

a dive in which the diver bends to touch the ankles before straightening out

Class:

act noun (acts and actions)

Plural:

jackknives

Type of:

dive » swimming » water sport » sports

Original source:

Princeton WordNet

Etymology:

"jack-" + "knife"
(Source: New World Dictionary)  [more]

All senses of jackknife...

Definition references  (+images)

Collins Dictionary:

jackknife | jackknives [plural]

a knife with the blade pivoted to fold into a recess in the handle | a former name for a type of dive in which the diver bends at the waist in midair, ... (32 of 370 words, 4 definitions, 5 usage examples, pronunciation)

www​.collinsdictionary​.com​/dictionary​/english​/jackknife

Random House Dictionary:

jackknife | jackknives [plural] | jackknifed [past tense] | jackknifing [present participle]

a large pocketknife. | [diving] a dive in which the diver bends in midair to touch the toes, keeping the legs straight, and then straightens out. | to ... (26 of 138 words, 9 definitions, 2 usage examples, pronunciation)

dictionary​.infoplease​.com​/jackknife

Oxford Dictionary:

jackknife | jackknives [plural] | jackknifed [past tense] | jackknifing [present participle] | jackknifes [3rd-person singular present]

a large knife with a folding blade. | a dive in which the body is first bent at the waist and then straightened. | [statistics] : a method of ... (27 of 124 words, 6 definitions, 2 usage examples, pronunciation)

oxforddictionaries​.com​/definition​/english​/jackknife

Wikipedia:

Jackknife [disambiguation]

may refer to: Jackknife, pocket knife | Jacknife, 1989 American film | Jackknife, jackknife hold, a pinning move in wrestling | Jackknife, kicking move involving 540-degree rotation | Jackknife, resampling technique in statistics | Jackknife, jackknife... (31 of 111 words, 11 definitions)

en​.wikipedia​.org​/wiki​/Jackknife

Merriam-Webster:

jackknife [entry 1, noun]

a large strong pocketknife | a dive executed headfirst in which the diver bends from the waist and touches the ankles while holding the knees unbent ... (25 of 53 words, 2 definitions, pronunciation)

www​.merriam-webster​.com​/dictionary​/jackknife

jackknife [entry 2, verb]

to cut with a jackknife | to cause to double up like a jackknife | to double up like a jackknife | to turn and form an angle of 90 degrees or less ... (30 of 88 words, 4 definitions, 1 usage example)

www​.merriam-webster​.com​/dictionary​/jackknife show=1

New World Dictionary:

jackknife [United States] | jackknives [plural] | jackknifed [past tense] | jackknifing [present participle]

a large pocketknife | a dive in which the diver keeps his knees unbent, touches his feet with his hands, and then straightens out just before plunging ... (26 of 83 words, 6 definitions, pronunciations)

www​.yourdictionary​.com​/jackknife

American Heritage Dictionary:

jackknife | jackknifed [past tense] | jackknifing [present participle] | jackknifes [3rd-person singular present]

A large clasp knife. | [sports] A dive in the pike position, in which the diver straightens out to enter the water hands first. | To fold or double ... (27 of 73 words, 6 definitions, 1 usage example, pronunciation)

www​.yourdictionary​.com​/jackknife

Macmillan British Dictionary:

jackknife [countable] | jackknives [plural]

a small knife with a blade that folds into its handle | a dive in which you jump high, touch your toes, and then stretch your legs out straight before ... (29 of 62 words, 2 definitions, pronunciation)

www​.macmillandictionary​.com​/dictionary​/british​/jackknife

jackknife [intransitive, verb] | jackknifed [past tense] | jackknifing [present participle] | jackknifes [3rd-person singular present]

if a truck or train jackknifes, it bends in the middle and its connected parts fold towards each other (19 of 48 words, pronunciation)

www​.macmillandictionary​.com​/dictionary​/british​/jackknife 8

Wiktionary:

jackknife | jackknives [plural] | jackknifed [past tense] | jackknifing [present participle] | jackknifes [3rd-person singular present] | leave-one-out [synonym, sense-specific]

Alternative spelling of jack-knife. | [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 ... (37 of 44 words, 3 definitions)

en​.wiktionary​.org​/wiki​/jackknife

Britannica Encyclopedia:

diving [sport]

sport of plunging into water, usually head foremost, performed with the addition of gymnastic and acrobatic stunts. In its more elaborate, acrobatic ... (22 of 925 words, 6 images)

www​.britannica​.com​/E​Bchecked​/topic​/166649​/diving

Cambridge Dictionary:

diving

the sport of diving (jumping) into water or swimming under water (11 of 17 words, pronunciation)

dictionary​.cambridge​.org​/dictionary​/british​/diving

Encarta Dictionary:

jackknife | jackknives [plural] | jackknifed [past tense] | jackknifing [present participle] | jackknifes [3rd-person singular present]

a large pocketknife | a dive in which the diver jumps, bends the body at the waist while keeping the legs together and straight, then straightens out ... (26 of 161 words, 5 definitions, pronunciations)

encarta​.msn​.com​/dictionary 1861622805​/definition​.html  [offline]

Etymology reference

New World Dictionary:

jackknife [United States] | jackknives [plural] | jackknifed [past tense] | jackknifing [present participle]

Origin: "jack-" + "knife"

www​.yourdictionary​.com​/jackknife

jack-

Origin: Middle English Jacke, Jake from Old French Jaque, Jaques from ecclesiastical Late Latin Jacobus, "Jacob"

www​.yourdictionary​.com​/jack-prefix

knife | knives [plural] | knifed [past tense] | knifing [present participle]

Origin: Middle English knif from Old English cnif, akin to German kneif, Old Norse knīfr from Indo-European *gneibh- ( derives Lithuanian gnaibis, a pinching)

www​.yourdictionary​.com​/knife

Audio references

Collins Dictionary:

jackknife | jackknives [plural]

Audio: British English pronunciation of "jackknife"

www​.collinsdictionary​.com​/dictionary​/english​/jackknife

Macmillan British Dictionary:

jackknife [countable] | jackknives [plural]

Audio: British English pronunciation of "jackknife"

www​.macmillandictionary​.com​/dictionary​/british​/jackknife

jackknife [intransitive, verb] | jackknifed [past tense] | jackknifing [present participle] | jackknifes [3rd-person singular present]

Audio: British English pronunciation of "jackknife"

www​.macmillandictionary​.com​/dictionary​/british​/jackknife 8

Macmillan American Dictionary:

jackknife [countable] | jackknives [plural]

Audio: North American pronunciation of "jackknife"

www​.macmillandictionary​.com​/dictionary​/american​/jackknife

jackknife [intransitive, verb] | jackknifed [past tense] | jackknifing [present participle] | jackknifes [3rd-person singular present]

Audio: North American pronunciation of "jackknife"

www​.macmillandictionary​.com​/dictionary​/american​/jackknife 8

the Free Dictionary:

jackknife

Audio 1: North American English pronunciation of "jackknife"

Audio 2: British English pronunciation of "jackknife"

Audio 3: North American English pronunciation of "jackknife" by speech synthesizer

www​.thefreedictionary​.com​/jackknife

Google Dictionary:

jackknife | jackknives [plural] | jackknifed [past tense] | jackknifing [present participle] | jackknifes [3rd-person singular present]

Audio: English pronunciation of "jackknife"

www​.google​.com​/#hl=en&tbs=dfn​:1&fp=1&q=jackknife

Merriam-Webster Pronunciation:

jackknife

Audio: North American pronunciation of "jackknife"

www​.merriam-webster​.com​/audio​.php file=jackkn​01 word=jackknife

YourDictionary Audio:

jackknife

Audio: North American English pronunciation of "jackknife" by speech synthesizer

www​.yourdictionary​.com​/jackknife

Page last updated: 2013-06-26

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