English dictionary

jackknife

/'/dZ//&/k,n/aI/f/

Definitions, examples, synonyms and antonyms from WordNet 3.0.

noun

a large knife with one or more folding blades

noun.artifact

Synonyms clasp knife

Source: WordNet 3.0
a dive in which the diver bends to touch the ankles before straightening out

noun.act

Source: WordNet 3.0
A large, strong clasp knife for the pocket; a pocket knife.

noun

Source: webster1913

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

verb.motion

Source: WordNet 3.0