a mixture containing two or more metallic elements or metallic and nonmetallic elements usually fused together or dissolving into each other when molten(noun.substance)
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.(noun)
source: webster1913
verb (v)
lower in value by increasing the base-metal content(verb.change)