an electrical device that can interrupt the flow of electrical current when it is overloaded
"The old fuse blew during a thunderstorm, cutting power to prevent the wiring from overheating."
A cord that, when lit, conveys the fire to some explosive device.
"The fuse was carefully lit and burned down until it reached the dynamite hidden beneath the floorboards."
In plain English: A fuse is a thin wire inside an electrical device that breaks the circuit to stop electricity from flowing when there is too much of it.
"The fuse blew and cut off power to the whole house during the storm."
Usage: As a noun, fuse refers specifically to the slow-burning cord used in explosives or fireworks rather than an electrical safety switch. When using it as a verb, remember that fusing materials implies melting them into a single unified mass through heat.
become plastic or fluid or liquefied from heat
"The substances fused at a very high temperature"
equip with a fuse; provide with a fuse
"The mechanic carefully fused the explosive charge to the trigger mechanism before testing it."
To melt together; to blend; to mix indistinguishably.
"The intense heat caused the two distinct metals to fuse into a single, seamless alloy."
In plain English: To fuse something means to join two pieces together so tightly that they become one solid piece, often using heat.
"The wires fused together because they were twisted tightly."
The word fuse comes from the Old French fusée, which was borrowed into English to describe a slow-burning cord used for lighting cannons. This term ultimately traces back to the Latin fūsus, meaning "spindle."