In the context of lightsabers from the Star Wars universe, the term "Switch" generally refers to the mechanism that activates the lightsaber, typically a button or activation switch on the hilt. The hilt is the handle of the lightsaber, which houses the internal components and provides a grip for the user.
So, you could describe a lightsaber as being made up of the hilt and the switch, since both are essential components of the overall weapon. The hilt provides structure and balance, while the switch is necessary for igniting and deactivating the blade. However, a lightsaber also includes other components such as the blade emitter, focusing crystals, and various technological elements that contribute to its functionality.