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jackknife

PRIMARY MEANINGS OF: jackknife

1
n
a large knife with one or more folding blades
2
nv
a dive in which the diver bends to touch the ankles before straightening out
dive into the water bending the body at the waist at a right angle, like a jackknife
FULL DEFINITIONS OF: jackknife
1

n a large knife with one or more folding blades

Synonyms:
clasp knife
Type of:
pocket knife, pocketknife
a knife with a blade that folds into the handle; suitable for carrying in the pocket
2

n a dive in which the diver bends to touch the ankles before straightening out

Type of:
dive, diving
a headlong plunge into water

v dive into the water bending the body at the waist at a right angle, like a jackknife

Type of:
dive
plunge into water
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