n.
1.a large knife with one or more folding blades
2.a dive in which the diver bends to touch the ankles before straightening out jackknife v.
1.dive into the water bending the body at the waist at a right angle, like a jackknife
Idiom of the Day
under one's nose
within sight of someone, easily seen or found
My father found his driver`s license right under his nose where he had left it.