sol·​der | \ ˈsä-dər How to pronounce solder (audio) , ˈsȯ-, British also ˈsäl-də, ˈsōl- \

Definition of solder

 (Entry 1 of 2)

1 : a metal or metallic alloy used when melted to join metallic surfaces especially : an alloy of lead and tin so used
2 : something that unites


soldered; soldering\ ˈsä-​d(ə-​)riŋ How to pronounce solder (audio) , ˈsȯ-​ , British also  ˈsäl-​ , ˈsōl-​ \

Definition of solder (Entry 2 of 2)

transitive verb

1 : to unite or make whole by solder
2 : to bring into or restore to firm union a friendship soldered by common interests

intransitive verb

1 : to use solder
2 : to become united or repaired by or as if by solder

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Other Words from solder


solderability \ ˌsä-​də-​rə-​ˈbi-​lə-​tē How to pronounce solder (audio) , ˌsȯ-​ \ noun
solderer \ ˈsä-​dər-​ər How to pronounce solder (audio) , ˈsȯ-​ \ noun

Examples of solder in a Sentence

Verb Wires are soldered onto the circuit board.
Recent Examples on the Web: Noun Tin the terminals on the back of the socket by heating them with the soldering iron and applying a bit of solder. Bradley Ford, Popular Mechanics, "How to Make a Bluetooth Speaker Out of Just About Anything," 29 Mar. 2021 The review that led to the punishment was ordered after the death of Vanessa Guillen, a 20-year-old solder. Harold Maass, TheWeek, "10 things you need to know today: December 9, 2020," 9 Dec. 2020 On a more personal level, White is turning to the activity deeply embedded in every solder — the daily workouts and runs that are the bedrock of every base. Lolita C. Baldor, Star Tribune, "Commander seeks to get embattled Fort Hood 'back on track'," 21 Nov. 2020 The group teaches these kids to hammer, drill, pour concrete, solder, bend sheet metal, use wire and collaborate on a wide range of building experiments. Jessica Dulong, CNN, "Girls with power tools build their way to focus and calm," 13 Oct. 2020 Using a wire cutter, snip each lead just above the mound of solder. Mitch Altman, Popular Mechanics, "How To Get Started in Soldering," 2 Sep. 2020 If your car has a copper radiator or heater core, for example, that used coolant will be contaminated with lead solder. Mike Allen, Popular Mechanics, "How to Maintain and Flush a Cooling System So Your Car Doesn’t Overheat," 27 Aug. 2020 And to make installation easier, join the new sillcock to the existing piping with push-fit solder-less fittings. Joseph Truini, Popular Mechanics, "How To Winterize Your Pipes and Prevent a Frozen Disaster," 17 Feb. 2020 Elsewhere in Iraq, a car bombing wounded at least four Iraqi solders on a highway leading to a border crossing with Saudi Arabia, according to a statement from the Iraqi joint command. Washington Post, "Turkey targets Kurdish rebels in Iraq, killing 4 Yazidis," 16 Jan. 2020 Recent Examples on the Web: Verb The Comet Lake design also includes a thinner die STIM, or solder thermal interface material. Mark Hachman, PCWorld, "Intel's 'Comet Lake-S' 10th-gen Core CPUs hit 10 cores and 5.3GHz speeds," 30 Apr. 2020 To install these unions, simply clean all the tubing ends and fittings as before, add some flux and solder the parts. Steve Willson, Popular Mechanics, "How To Install An Electric Water Heater," 24 Aug. 2018 This MacBook has a removable SSD, but on newer models, Apple soldered the SSD into the logic board. Kevin Dupzyk, Popular Mechanics, "Things Come Apart: MacBook Air," 24 Aug. 2019 The sheet was cut into three parts, which were soldered together, hammered, and rolled thin again. Brian T. Allen, National Review, "The Winter Show’s Many Small Treasures," 28 Jan. 2020 The cellular modem is a large separate chip that is soldered onto the motherboard: a Quectel EG25-G. When the back of the phone is peeled off, the innards actually have some special components. Ron Amadeo, Ars Technica, "The PinePhone starts shipping—a Linux-powered smartphone for $150," 16 Jan. 2020 Layers of silver, gold, copper, and a sheet of silver/gold alloy were soldered together in a thin sheet. Brian T. Allen, National Review, "The Winter Show’s Many Small Treasures," 28 Jan. 2020 After adding a modem that could send and receive data across a phone line, Mr. Suess soldered together some additional hardware that could automatically restart the machine and then load Mr. Christiansen’s software whenever someone dialed in. New York Times, "Randy Suess, Computer Bulletin Board Inventor, Dies at 74," 20 Dec. 2019 Tiffany-style lamps are made by crimping narrow pieces of copper foil around the edges of the glass pieces, then soldering over the copper on adjoining pieces so the bead of copper holds them together. Jeanne Huber, Washington Post, "For antique Tiffany-style lamp, re-soldering is the answer," 9 Dec. 2019

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'solder.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of solder


14th century, in the meaning defined at sense 1


15th century, in the meaning defined at transitive sense 1

History and Etymology for solder


Middle English soudure, from Anglo-French, from souder to solder, from Latin solidare to make solid, from solidus solid

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Time Traveler for solder

Time Traveler

The first known use of solder was in the 14th century

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Statistics for solder

Last Updated

5 Apr 2021

Cite this Entry

“Solder.” Dictionary, Merriam-Webster, Accessed 15 Apr. 2021.

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More Definitions for solder



English Language Learners Definition of solder

 (Entry 1 of 2)

: a mixture of metals (such as lead and tin) that is melted and used to join metal parts together



English Language Learners Definition of solder (Entry 2 of 2)

: to join (something made of metal) to something else with solder


sol·​der | \ ˈsä-dər How to pronounce solder (audio) \

Kids Definition of solder

 (Entry 1 of 2)

: a metal or a mixture of metals used when melted to join or repair surfaces of metal


soldered; soldering

Kids Definition of solder (Entry 2 of 2)

: to join together or repair with solder

More from Merriam-Webster on solder

Nglish: Translation of solder for Spanish Speakers Encyclopedia article about solder

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