fuse definition

1. an electrical device that can interrupt the flow of electrical current when it is overloaded
2. any igniter that is used to initiate the burning of a propellant
3. become plastic or fluid or liquefied from heat
• examples: The substances fused at a very high temperature
4. equip with a fuse; provide with a fuse
5. make liquid or plastic by heating
• examples: The storm fused the electric mains