knife

knife

noun \ˈnīf\

plural knives \ˈnīvz\

Definition of KNIFE

1

: any of various instruments used in surgery primarily to sever tissues: as a : a cutting instrument consisting of a sharp blade attached to a handle b : an instrument that cuts by means of an electric current

2

: surgery 3—usually used in the phrase under the knife <went under the knife yesterday> <was afraid of the knife>