Soldering is joining metal with a lower-melting alloy. Soldering iron, soldering the joint, a dry soldering joint.
The parts themselves never melt, which is what separates soldering from welding, and the alloy flows into the joint by capillary action. Most electronics is held together this way, and it is now done by machine at scale.
1nounsolderingJoining metal with a lower-melting alloy.
“He learned soldering so he could fix the broken wires in his old radio.”
soldering is a joining.