jackknife

noun

/ˈdʒæknaɪf/

(plural jackknives

/ˈdʒæknaɪvz/

)

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verb

/ˈdʒæknaɪf/

[intransitive]

Verb Forms

present simple I / you / we / they jackknife	/ˈdʒæknaɪf/ /ˈdʒæknaɪf/
he / she / it jackknifes	/ˈdʒæknaɪfs/ /ˈdʒæknaɪfs/
past simple jackknifed	/ˈdʒæknaɪft/ /ˈdʒæknaɪft/
past participle jackknifed	/ˈdʒæknaɪft/ /ˈdʒæknaɪft/
-ing form jackknifing	/ˈdʒæknaɪfɪŋ/ /ˈdʒæknaɪfɪŋ/

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to form a V-shape. For example if a lorry that is in two parts jackknifes, the driver loses control and the back part moves towards the front part.Topics Transport by car or lorryc2
Oxford Collocations Dictionary
Jackknife is used with these nouns as the subject:
lorry
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