[ fyooz ]
/ fyuz /
Save This Word!
See synonyms for: fuse / fused / fusing on Thesaurus.com

a tube, cord, or the like, filled or saturated with combustible matter, for igniting an explosive.
verb (used with object), fused, fus·ing.
Should you take this quiz on “shall” versus “should”? It should prove to be a quick challenge!
Question 1 of 6
Which form is used to state an obligation or duty someone has?

Idioms about fuse

    have a short fuse, Informal. to anger easily; have a quick temper.

Origin of fuse

1635–45; <Italian fuso<Latin fūsus spindle


fuseless, adjectivefuselike, adjective

Other definitions for fuse (2 of 2)

[ fyooz ]
/ fyuz /

Electricity. a protective device, used in an electric circuit, containing a conductor that melts under heat produced by an excess current, thereby opening the circuit.Compare circuit breaker.
verb (used with object), fused, fus·ing.
to combine or blend by melting together; melt.
to unite or blend into a whole, as if by melting together: The author skillfully fuses these fragments into a cohesive whole.
verb (used without object), fused, fus·ing.
to become liquid under the action of heat; melt: At a relatively low temperature the metal will fuse.
to become united or blended: The two groups fused to create one strong union.
Chiefly British. to overload an electric circuit so as to burn out a fuse.

Origin of fuse

1675–85; from Latin fūsus “melted, poured, cast,” past participle of fundere

synonym study for fuse

2. See melt1.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2022


What is a basic definition of fuse?

Fuse means to unite or blend together. Fuse also refers to a protective device in an electrical current and to a tube or cord used to light explosives.

Fuse is used in metalworking and similar industries to refer to combining metals by melting them down into liquids. In everyday use, fuse is used figuratively to mean to combine or unite anything as if they were melted together. For example, a band might fuse metal and electronic music to make a unique sound. Something that has been made by fusing things together is called a fusion.

  • Real-life examples: Copper scraps can be fused together to make wires. Science fiction often fuses real science with fictional ideas. A mad scientist might fuse animals together to make monsters.
  • Used in a sentence: The two kingdoms fused together to create a powerful nation. 

As a noun, fuse refers to a safety device designed to protect electrical equipment from melting or catching on fire. A fuse usually resembles a small rod or wire that is designed to melt from the heat of an electrical current that is moving too fast. Once the fuse melts, the electrical circuit is broken. This stops the current from moving and protects the more expensive or dangerous equipment from melting or catching on fire.

Fuses are an extremely common safety device (alongside circuit breakers) and are usually kept in a fuse box located in a remote part of a house or building. The phrase blow a fuse comes from this sense of fuse.

  • Real-life examples: Your house may have a fuse box that you can open to replace damaged fuses. Electronic devices such as televisions and computers almost always have fuses to prevent fires or explosions caused by electricity.
  • Used in a sentence: The computer technician had to replace several blown fuses in the motherboard.  

The word fuse also refers to a cord, wire, rope, or similar object that is lit on fire in order to ignite an explosive. The purpose of a fuse is to delay an explosion.

  • Real-life examples: Almost all fireworks have fuses to prevent them from exploding immediately, such as in a person’s hand. An explosive weapon such as a bomb might have a fuse so the user can run away before it explodes. Explosives used in manufacturing or mining, such as dynamite, may also have fuses for the same reason.
  • Used in a sentence: She lit the fuse of the giant firecracker. 

Where does fuse come from?

The first records of fuse come from around 1635. It ultimately comes from the Latin word fūsus, meaning “melted, poured, or cast.”

Did you know … ?

What are some other forms related to fuse?

  • defuse (verb)
  • fuseless (adjective)
  • fuselike (adjective)

What are some synonyms for fuse?

What are some words that share a root or word element with fuse

What are some words that often get used in discussing fuse?

How is fuse used in real life?

Fuse is a word used to mean to combine things together. The electrical and explosive device senses of fuse are also common.

Try using fuse!

Which of the following words is NOT a synonym of fuse?

A. blend
B. combine
C. separate
D. meld

How to use fuse in a sentence

British Dictionary definitions for fuse (1 of 2)


US fuze

/ (fjuːz) /

a lead of combustible black powder in a waterproof covering (safety fuse), or a lead containing an explosive (detonating fuse), used to fire an explosive charge
any device by which an explosive charge is ignited
blow a fuse See blow 1 (def. 12)
(tr) to provide or equip with such a fuse

Derived forms of fuse

fuseless, adjective

Word Origin for fuse

C17: from Italian fuso spindle, from Latin fūsus

British Dictionary definitions for fuse (2 of 2)

/ (fjuːz) /

to unite or become united by melting, esp by the action of heatto fuse borax and copper sulphate at a high temperature
to become or cause to become liquid, esp by the action of heat; melt
to join or become combined; integrate
(tr) to equip (an electric circuit, plug, etc) with a fuse
British to fail or cause to fail as a result of the blowing of a fusethe lights fused
a protective device for safeguarding electric circuits, etc, containing a wire that melts and breaks the circuit when the current exceeds a certain value

Word Origin for fuse

C17: from Latin fūsus melted, cast, poured out, from fundere to pour out, shed; sense 5 influenced by fuse 1
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Scientific definitions for fuse

[ fyōōz ]

A safety device that protects an electric circuit from becoming overloaded. Fuses contain a length of thin wire (usually of a metal alloy) that melts and breaks the circuit if too much current flows through it. They were traditionally used to protect electronic equipment and prevent fires, but have largely been replaced by circuit breakers.
A cord of readily combustible material that is lighted at one end to carry a flame along its length to detonate an explosive at the other end.
To melt something, such as metal or glass, by heating.
To blend two or more substances by melting.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

Other Idioms and Phrases with fuse


see blow a fuse.

The American Heritage® Idioms Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.