Hello All
From Cornell Law;
A deadly weapon is usually an object, instrument, substance, or device which is intended to be used in a way that is likely to cause death, or with which death can be easily and readily produced. A deadly weapon need not be a weapon in the traditional sense. For example, in Acers v. United States the Supreme Court acknowledged that a large rock could be considered a deadly weapon when used by a defendant to strike the victim in the head, fracturing his skull.
Some jurisdictions allow for even more flexibility in the definition of a deadly weapon. For example, Texas courts held in Stanul v. State that a floor could be considered a deadly weapon when the defendant slammed the victim’s head down upon it, and held in Turner v. State that hands and fists could be considered deadly weapons under certain circumstances.
Some states may have different wording, or specifics, but this gives you a “general” definition of “deadly weapon.”