Define Knife Meaning

1) An object with a blade, primarily used for cutting.

2) To stab someone with a knife.

A Small Sharp blade that is used for cutting things. Can change the tide of battle.

a knife can come in many shapes and sizes.
usually consist of a blade made of some kind of metal or stone, with a handle at the other end.
there are fixed blade knives. (meaning that they don't fold, they need a sheath to keep from getting cut)
and folding (the blade usually folds into the blade.)
one of the most widely known is the switch blade. (just a knife that has a spring loaded blade, no big deal)
and then there are knifes that have the blade the slides out of the handle. and some that have handles that fold onto the blade.
then there are piece of crap fantasise knives, dont waste your money.
not a weapon unless used as one, a knife is a tool, that doubles as a weapon.

then there is the term, to knife.
means to stab or cut someone, but not necessarily kill them.
very similar to shanking someone. (although shanks are better at a stab, usually favored in the hammer fist or oriental knife hold.)

A sharp metal stabby stick

A tool carried by people from "the hood" for performing various daily tasks.

A tool for cutting with a handle at one end, and a flat blade of roughly equal length.

To knife is to use the knife to attack a person or object.

to engage in intercourse

n. pl. knives (nvz)
A cutting instrument consisting of a sharp blade attached to a handle.
A cutting edge; a blade.

v. knifed, knif·ing, knifes
v. tr.
To use a knife on, especially to stab; wound with a knife.
Informal. To betray or attempt to defeat by underhand means.

Just like shotgun or pistol, it refers to a seating in a car, this time referring to the back left window seat.

Great tool primarily used for cutting flesh and plant tissue. It's use has gone down since the invention of the gun.