I am an attorney in Wisconsin, and this is the definition of dangerous weapon in Wisconsin. There are a lot of laws where if you do something while armed with a dangerous weapon, it increases the penalty, sometimes significantly. The easy one is the first one, a firearm. But as you see, the last one is a catchall that covers anything from kitchen knives, to baseball bats, to martial arts weapons.
(10)āāDangerous weapon" means any firearm, whether loaded or unloaded; any device designed as a weapon and capable of producing death or great bodily harm; any ligature or other instrumentality used on the throat, neck, nose, or mouth of another person to impede, partially or completely, breathing or circulation of blood; any electric weapon, as defined in s.
941.295 (1c) (a); or any other device or instrumentality which, in the manner it is used or intended to be used, is calculated or likely to produce death or great bodily harm.