A method of joining two metallic surfaces by melting an alloy between them (noun)
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Use "soldering" in a sentence
"Some soldering is required in this set of instructions, but if you’re not experienced with this more advanced DIY skill, there are many types of LED rope lights that have all sorts of different pre-made connectors available."
"Component to printed circuit board soldering, that is."
"My existing metal-joining technology, silver soldering aka brazing would produce joints that would melt like butter at 600 degrees Celsius or so, which is a far cry from the thousand-degree environments I play with..."