What is the meaning of Solder?

Any of various easily-melted alloys, commonly of tin and lead, that are used to mend, coat, or join metal objects, usually small.

Figuratively, circumstances or emotions that strongly bond things or persons together in analogy to solder that joins metals.

to join items together, or to coat them with solder

to join things as if with solder.

attic

to close (a deal)

to settle, to pay off (debt)

to sell at sales, to have a sale

to end up (in), to result (in)

solder: any of various easily-melted alloys, commonly of tin and lead, that are used to mend, coat, or join metal objects, usually small

Source: wiktionary.org