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Word of the Day Tuesday, June 9, 2026

jackknife

/dʒæknaɪf/ noun, verb · British & US
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What does jackknife mean?

noun, verb

A folding knife with a blade that can be opened by a lever or a spring, or to cut or sever something suddenly or violently. To cut or sever something suddenly or violently.

Example

"He used a jackknife to cut the rope and free the trapped animal."

Definition generated by AI and curated by RJS Tech Solutions LLP.

Synonyms for jackknife

Antonyms of jackknife

Rhymes with jackknife

Etymologically related