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 
ˈsȯ-,
British also ˈsäl-,
ˈsōl-
1
: to unite or make whole by solder
2
: to bring into or restore to firm union
a friendship soldered by common interests
Examples of solder in a Sentence
Verb
Wires are soldered onto the circuit board.
Recent Examples on the Web
IEEE Spectrum, 20 Oct. 2025
The governor has called on Trump to allow the remaining solders to leave.
—Stephen Hobbs, Sacbee.com, 2 Sep. 2025
PC Magazine, 15 Oct. 2025
Each component had to be soldered under magnification, with wiring trimmed to millimeter precision and excess material removed wherever possible.
—Aamir Khollam, Interesting Engineering, 14 Oct. 2025
See All Example Sentences for solder
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Noun
The multiple layers of silicon in these 3D stacks are mostly connected by microscopic balls of solder, or in some advanced cases just by their copper terminals.
—IEEE Spectrum, 20 Oct. 2025
The governor has called on Trump to allow the remaining solders to leave.
—Stephen Hobbs, Sacbee.com, 2 Sep. 2025
Verb
All models come with 16GB of RAM, soldered in place, meaning memory upgrades aren’t an option.
—PC Magazine, 15 Oct. 2025
Each component had to be soldered under magnification, with wiring trimmed to millimeter precision and excess material removed wherever possible.
—Aamir Khollam, Interesting Engineering, 14 Oct. 2025
See All Example Sentences for solder
Cite this Entry
“Solder.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/solder. Accessed 31 Oct. 2025.
Copy CitationKids Definition
solder
1 of 2 noun
sol·der
ˈsäd-ər
ˈsȯd-
: a metal or a mixture of metals (as of lead and tin) used when melted to join metallic surfaces
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