1. To become plastic or fluid or liquefied from heat.
2. To equip with a fuse; provide with a fuse.
3. To make liquid or plastic by heating.

ETYM For fusee, fusil a firelock.
1. Any device by which an explosive charge is ignited; SYN. fuze, fusee, fuzee, primer.
2. Can interrupt the flow of electrical current when it is overloaded; SYN. electrical fuse.
A circuit element that burns out or breaks when the current passing through it exceeds a certain level. A fuse protects a circuit from damage caused by excess current. It performs the same function as a circuit breaker, but it cannot be reset, so it must be replaced if it breaks. A fuse consists of a short length of wire of a specific composition and thickness; the thicker the wire, the more current it can pass before the wire melts and breaks the circuit.
In electricity, a wire or strip of metal designed to melt when excessive current passes through. It is a safety device to stop at that point in the circuit when surges of current would otherwise damage equipment and cause fires. In explosives, a fuse is a cord impregnated with chemicals so that it burns slowly at a predetermined rate. It is used to set off a main explosive charge, sufficient length of fuse being left to allow the person lighting it to get away to safety.