Definition of solder in US English:



  • A low-melting alloy, especially one based on lead and tin or (for higher temperatures) on brass or silver, used for joining less fusible metals.

    • ‘Early food cans were sealed with thick seams of lead solder, which caused slight poisoning when they contained acidic foodstuffs.’
    • ‘Replace lead pipes with copper, and use lead-free solder when installing or repairing plumbing.’
    • ‘The invention Intel is announcing does away with the top layer of the package and the bumps of solder by connecting copper wiring directly from the core of the package to the processor.’
    • ‘Computer screens can contain up to eight pounds of lead, and the National Recycling Coalition says other electronic items can contain copper, lead solder, nickel, zinc, cadmium, mercury and PCBs.’
    • ‘In the past, copper pipes were joined with lead based solder which is currently banned from usage.’
    • ‘Japanese manufacturers have vowed to remove lead from their solder by 2003 due to environmental and recycling concerns.’
    • ‘The key replacement for tin/lead solder is a tin/silver/copper alloy available exclusively from Japan.’
    • ‘Other potential sources of lead include fishing-line weights, metal weights in curtains, antique ceramics, leaded glass, and water from pipes with lead solder.’
    • ‘In many power devices handling large currents, high-melting-point solder containing lead is used internally to ensure high reliability.’
    • ‘Until their ban in 1991, lead pipes and solder commonly were used in home plumbing systems.’
    • ‘The encasement design was elegantly simple: two sheets of glass with metallic copper flashed on the edges, joined with solder to a lead ribbon that sealed the three-eighths-inch gap between the glass.’
    • ‘The most important use of tin in the United States is the manufacture of solder, an alloy made of tin and lead.’
    • ‘The now familiar swinging ‘trapdoor’ breechblock was fitted and attached to the top of the barrel with a hinge secured by soft solder and a single screw.’
    • ‘Many other homes in the city, however, have lead pipes, solder or leaded brass faucets which can also contribute to lead leaching.’
    • ‘Use of tin solder is growing in electronics, especially computer hardware, and modern laptop liquid crystal screens have a tin-oxide film for their panels.’
    • ‘The electronics industry utilizes hot gas soldering to reflow or melt solder in localized areas on circuit assemblies.’
    • ‘Occasionally, a pregnant woman is exposed to significant amounts of lead in her drinking water if her home has lead pipes, lead solder on copper pipes or brass faucets.’
    • ‘Some alloys, like solder, which is usually 60% tin and 40% lead, are used to make electrical circuits.’
    • ‘There are 37 soldered fins on each side of the heatsink for a grand total of 74 copper fins connected to the copper base by means of solder.’
    • ‘In Washington, the chloramines also caused lead to leach out of service lines, water meters, plumbing with lead solder and brass faucets that contain lead.’


[with object]
  • Join with solder.

    • ‘She thinks that a view through an electron microscope should provide the answers by showing the places in which they were soldered, but as the Zlatinitsa treasure shows, one can never be sure.’
    • ‘Cut a small sliver of the silver solder for each joint to be soldered.’
    • ‘Almost any method of joining is applicable to aluminum: riveting, welding, brazing or soldering.’
    • ‘I have tied and soldered my own disc-brake mountain bike wheels for years now, and I notice a difference not only in lateral stiffness but especially in application of the disc brake.’
    • ‘Having undone the existing unit I discovered that the wires were soldered to the terminals.’
    • ‘‘Yep,’ he said as he soldered a wire onto a circuit board that was attached to a box of gears.’
    • ‘In addition, they can be joined by brazing and soldering.’
    • ‘I felt that a bond of trust was soldered between us.’
    • ‘When some solder is applied to the pins previous to soldering the wires, the latter ones will connect more easy.’
    • ‘The tape was soldered to the glass after the edge of the glass was coated with a film of copper to make it more receptive to the solder.’
    • ‘The ordinary grades of wrought zinc can be soldered easily by conventional methods.’
    • ‘The fire is believed to have happened when the plumber was soldering a water pipe and insulation in the cavity wall caught fire.’
    • ‘Steph and Peter get down to the tricky business of soldering the widgets and gadgets that make up the complex technology inside the new digital studios.’
    • ‘He said the technicians needed a week to repair the leaking pipe because they had to block it first from water inundation before soldering the leakages.’
    • ‘These joining methods may include welding, brazing, soldering, riveting, or bolting.’
    • ‘Applying the soldering iron to the wires where they are soldered to the Centronics connector and pulling gently should be enough to undo the wires from the unwanted connector.’
    • ‘Copper can also be welded, brazed and soldered satisfactorily.’
    • ‘The coils are soldered in series, such that the current rotates in opposite directions, between the left and right signal-out wires.’
    • ‘To prepare for the reinstallation, a traditional support system of saddle bars and copper tie wires were soldered onto each window panel.’
    • ‘I find the physical work of soldering the wiring to the keyboard encoder challenging, mostly due to the tight quarters.’
    attach, join, fasten, fix, affix, couple, link, bridge, secure, make fast, tie, tie up, bind, fetter, strap, rope, tether, truss, lash, hitch, moor, anchor, yoke, chain
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Middle English: from Old French soudure, from the verb souder, from Latin solidare ‘fasten together’, from solidus ‘solid’.