Fuse

1. Afuseisasafetydeviceinanelectricplugorcircuit. Itcontainsapiece of wire which melts when there is a fault so that the flow of electricity stops.
An electrical safety device consisting of or including a wire or strip of fusible metal that melts and interrupts the circuit when the current exceeds a particular amperage.

A fuse is a safety device in an electric circuit. It contains a piece of wire which melts when there is a fault, so that the flow of electricity stops.

Sources:

Англійський словник Коллінза, електронний ресурс: https://www.collinsdictionary.com/

Словник Webster's Dictionary https://www.merriam-webster.com/