Definition of jackknife
English to English noun - a large knife with one or more folding blades
source: WordNet 3.0 - a dive in which the diver bends to touch the ankles before straightening out
source: WordNet 3.0 - A large, strong clasp knife for the pocket; a pocket knife.
source: Webster 1913 verb - dive into the water bending the body at the waist at a right angle, like a jackknife
source: WordNet 3.0
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Nearby Word
jackknife, jacksnipe, jambee, jambeau, jim bowie, jimp, jamb, jimmy hoffa, jump off, jump, jumbo, jumpy
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