Definition of jackknife

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  • jackknife is a valid Scrabble US word with a point value of 29
  • jackknife is a valid Scrabble UK word with a point value of 29
  • jackknife is a valid Words with friends word with a point value of 33

Definition of jackknife

  • a large knife with one or more folding blades (noun)

    Synonyms

    1. clasp knife
  • a dive in which the diver bends to touch the ankles before straightening out (noun)
  • dive into the water bending the body at the waist at a right angle, like a jackknife (verb)

See definition of jackknife in Merriam Webster