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
come down to earth
to stop imagining or dreaming about things
My friend has finally come down to earth and is seriously looking for a job.