knife

knife is a Noun

Definition:

[1] An instrument consisting of a thin blade, usually of steel and having a sharp edge for cutting, fastened to a handle, but of many different forms and names for different uses; as, table knife, drawing knife, putty knife, pallet knife, pocketknife, penknife, chopping knife, etc.

[2] A sword or dagger. The coward conquest of a wretch`s knife. Shak. Knife grass (Bot.) a tropical American sedge (Scleria latifolia), having leaves with a very sharp and hard edge, like a knife. -- War to the knife, mortal combat; a conflict carried to the last extremity.