A knife with a blade that folds closed is called a jackknife. Most jackknives are compact enough to fit in a pocket, but we don't suggest your taking one to school.
A large, strong clasp knife for the pocket; a pocket knife.
Noun
a dive in which the diver bends to touch the ankles before straightening out
Noun
a large knife with one or more folding blades
Verb
dive into the water bending the body at the waist at a right angle, like a jackknife
n.
A large, strong clasp knife for the pocket; a pocket
knife.
Jackknife
A large, strong clasp knife for the pocket; a pocket knife.
Usage Examples
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