noun A utensil or a tool designed for cutting, consisting of a flat piece of hard material, usually steel or other metal (the blade), usually sharpened on one edge, attached to a handle. The blade may be pointed for piercing.
He was looking for a knife to chop some steak.
noun A weapon designed with the aforementioned specifications intended for slashing or stabbing but too short to be called a sword; a dagger.
noun Any blade-like part in a tool or a machine designed for cutting, such as that of a chipper.
verb To cut with a knife.
verb To use a knife to injure or kill by stabbing, slashing, or otherwise using the sharp edge of the knife as a weapon.
She was repeatedly knifed in the chest.
verb To cut through as if with a knife.
The boat knifed through the water.
verb To betray, especially in the context of a political slate.
verb To positively ignore, especially in order to denigrate; compare cut.