1. Any of various fusible alloys, usually tin and lead, used to join metallic parts.
2. Something that joins or cements.
v. sol·dered, sol·der·ing, sol·ders
1. To unite or repair (parts, for example) with solder.
2. To join or unite: The agreement soldered the factions into an alliance.
1. To unite or repair something with solder.
2. To be joined or united.
[Middle English soudur, from Old French soudure, soldure, from souder, soulder, to solder, from Latin solidāre, to make solid, from solidus, solid; see SOLID.]
The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2018 by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
The American Heritage Dictionary Blog
Check out our blog, updated regularly, for new words and revised definitions, interesting images from the 5th edition, discussions of usage, and more.