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

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 is used to produce solder, a melted metal that connects computer chips to circuit boards, so demand has skyrocketed alongside purchases of consumer electronics during the pandemic. Hardika Singh, WSJ, 23 July 2021 The company said the issue is isolated to a limited number of homes that have lead in internal plumbing materials, such as lead solder or lead fixtures, but could not quantify the number of homes. Mike Nolan,, 19 July 2021 Drifting at around $14,000 a ton early last year the tin rush started with a surge in demand from the electronics industry where it is used as a solder to be selling on the London Metals Exchange (LME) this week for an all-time high of $32,700/t. Tim Treadgold, Forbes, 18 June 2021 Su also said that AMD's die-to-die approach uses direct copper connections, not solder bumps. Mark Hachman, PCWorld, 1 June 2021 In the past year, Brooks fixed chains in place with gold solder to craft goofy, endearing, googly-eyed brooches, rings, and necklaces., 29 Apr. 2021 And to make installation easier, join the new sillcock to the existing piping with push-fit solder-less fittings. Joseph Truini, Popular Mechanics, 17 Feb. 2021 Guillen, 20, was allegedly killed by another solder at the Killeen, Texas, base on April 22, 2020. Marlene Lenthang, ABC News, 22 Apr. 2021 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, 29 Mar. 2021 Recent Examples on the Web: Verb The Comet Lake design also includes a thinner die STIM, or solder thermal interface material. Mark Hachman, PCWorld, 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, 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, 24 Aug. 2019 The sheet was cut into three parts, which were soldered together, hammered, and rolled thin again. Brian T. Allen, National Review, 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, 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, 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, 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, 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.

See More

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

Learn More About solder

Time Traveler for solder

Time Traveler

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

See more words from the same century

Dictionary Entries Near solder




See More Nearby Entries 

Statistics for solder

Cite this Entry

“Solder.” Dictionary, Merriam-Webster, Accessed 3 Dec. 2021.

Style: MLA
MLACheck Mark Icon ChicagoCheck Mark Icon APACheck Mark Icon Merriam-WebsterCheck Mark Icon

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


Test Your Vocabulary

Farm Idioms Quiz

  • cow coming home
  • What does 'poke' refer to in the expression 'pig in a poke'?
True or False

Test your knowledge - and maybe learn something along the way.

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!