jackknife

3 ENTRIES FOUND:

1jack·knife

noun \ˈjak-ˌnīf\

Definition of JACKKNIFE

1
: a large strong pocketknife
2
: a dive executed headfirst in which the diver bends from the waist and touches the ankles while holding the knees unbent and then straightens out

First Known Use of JACKKNIFE

1711

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