What does alloy mean?
The definition of alloy
Al*loy”, n.
Etym: [OE. alai, OF. alei, F. aloyer, to alloy, alier to ally. See Alloy, v. t.]

1 Any combination or compound of metals fused together; a mixture of metals; for example, brass, which is an alloy of copper and zinc. But when mercury is one of the metals, the compound is called an amalgam.
2 The quality, or comparative purity, of gold or silver; fineness.
3 A baser metal mixed with a finer. Fine silver is silver without the mixture of any baser metal. Alloy is baser metal mixed with it. Locke.
4 Admixture of anything which lessens the value or detracts from; as, no happiness is without alloy. “Pure English without Latin alloy.” F. Harrison.

Al*loy”, v. t.
[imp. & p. p. Alloyed; p. pr. & vb. n. Alloying.]
Etym: [F. aloyer, OF. alier, allier, later allayer, fr. L. aligare. See Alloy, n., Ally, v.t., and cf. Allay.]

1 To reduce the purity of by mixing with a less valuable substance; as, to alloy gold with silver or copper, or silver with copper.
2 To mix, as metals, so as to form a compound.
3 To abate, impair, or debase by mixture; to allay; as, to alloy pleasure with misfortunes.

Al*loy”, v. t.
To form a metallic compound. Gold and iron alloy with ease. Ure.