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jackknife
jack·knife J0003700 (jăk′nīf′)n.1. A large clasp knife.2. Sports A dive in the pike position, in which the diver straightens out to enter the water hands first.v. jack·knifed, jack·knif·ing, jack·knifes v.tr.1. To fold or double (something or oneself) like a jackknife.2. To cut or stab with a jackknife.v.intr.1. To bend or fold up like a jackknife: A truck that had jackknifed was blocking the road.2. To form a 90° angle.jackknife (ˈdʒækˌnaɪf) n, pl -knives1. (Tools) a knife with the blade pivoted to fold into a recess in the handle2. (Swimming, Water Sports & Surfing) a former name for a type of dive in which the diver bends at the waist in midair, with the legs straight and the hands touching the feet, finally straightening out and entering the water headfirst: forward pike divevb (intr) 3. (Automotive Engineering) (of an articulated lorry) to go out of control in such a way that the trailer swings round at an angle to the cab4. (Swimming, Water Sports & Surfing) to make a jackknife divejack•knife (ˈdʒækˌnaɪf)
n., pl. -knives, n. 1. a large pocketknife. 2. a dive in which the diver bends in midair to touch the toes, keeping the legs straight, and then straightens out. v.i. 3. to bend over from or at the middle; double over like a jackknife. 4. (of a trailer truck) to have the cab and trailer swivel at the linkage until they form a Vshape, as the result of an abrupt stop or accident. 5. (in diving) to perform a jackknife. v.t. 6. to cause to jackknife. 7. to cut with a jackknife. [1705–15, Amer.] jackknife
Past participle: jackknifed
Gerund: jackknifing
| Imperative |
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| jackknife | | jackknife |
| Present |
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| I jackknife | | you jackknife | | he/she/it jackknifes | | we jackknife | | you jackknife | | they jackknife |
| Preterite |
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| I jackknifed | | you jackknifed | | he/she/it jackknifed | | we jackknifed | | you jackknifed | | they jackknifed |
| Present Continuous |
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| I am jackknifing | | you are jackknifing | | he/she/it is jackknifing | | we are jackknifing | | you are jackknifing | | they are jackknifing |
| Present Perfect |
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| I have jackknifed | | you have jackknifed | | he/she/it has jackknifed | | we have jackknifed | | you have jackknifed | | they have jackknifed |
| Past Continuous |
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| I was jackknifing | | you were jackknifing | | he/she/it was jackknifing | | we were jackknifing | | you were jackknifing | | they were jackknifing |
| Past Perfect |
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| I had jackknifed | | you had jackknifed | | he/she/it had jackknifed | | we had jackknifed | | you had jackknifed | | they had jackknifed |
| Future |
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| I will jackknife | | you will jackknife | | he/she/it will jackknife | | we will jackknife | | you will jackknife | | they will jackknife |
| Future Perfect |
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| I will have jackknifed | | you will have jackknifed | | he/she/it will have jackknifed | | we will have jackknifed | | you will have jackknifed | | they will have jackknifed |
| Future Continuous |
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| I will be jackknifing | | you will be jackknifing | | he/she/it will be jackknifing | | we will be jackknifing | | you will be jackknifing | | they will be jackknifing |
| Present Perfect Continuous |
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| I have been jackknifing | | you have been jackknifing | | he/she/it has been jackknifing | | we have been jackknifing | | you have been jackknifing | | they have been jackknifing |
| Future Perfect Continuous |
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| I will have been jackknifing | | you will have been jackknifing | | he/she/it will have been jackknifing | | we will have been jackknifing | | you will have been jackknifing | | they will have been jackknifing |
| Past Perfect Continuous |
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| I had been jackknifing | | you had been jackknifing | | he/she/it had been jackknifing | | we had been jackknifing | | you had been jackknifing | | they had been jackknifing |
| Conditional |
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| I would jackknife | | you would jackknife | | he/she/it would jackknife | | we would jackknife | | you would jackknife | | they would jackknife |
| Past Conditional |
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| I would have jackknifed | | you would have jackknifed | | he/she/it would have jackknifed | | we would have jackknifed | | you would have jackknifed | | they would have jackknifed |
Thesaurus| Noun | 1. | jackknife - a large knife with one or more folding bladesclasp knifepocket knife, pocketknife - a knife with a blade that folds into the handle; suitable for carrying in the pocket | | 2. | jackknife - a dive in which the diver bends to touch the ankles before straightening outdive, diving - a headlong plunge into water | | Verb | 1. | jackknife - dive into the water bending the body at the waist at a right angle, like a jackknifeathletics, sport - an active diversion requiring physical exertion and competitiondive - plunge into water; "I was afraid to dive from the board into the pool" |
TranslationsTaschenmesserfoldeknivlommeknivstille seg på tversjackknife
jackknife1. a knife with the blade pivoted to fold into a recess in the handle 2. a former name for a type of dive in which the diver bends at the waist in midair, with his legs straight and his hands touching his feet, finally straightening out and entering the water headfirst: forward pike dive AcronymsSeeJKjackknife
Synonyms for jackknifenoun a large knife with one or more folding bladesSynonymsRelated Wordsnoun a dive in which the diver bends to touch the ankles before straightening outRelated Wordsverb dive into the water bending the body at the waist at a right angle, like a jackknifeRelated Words |