alloy alloy /əˈlɔɪ/

noun

1. The state of impairing the quality or reducing the value of something  ( admixture , alloy )
   the state of impairing the quality or reducing the value of something
   
2. A mixture containing two or more metallic elements or metallic and nonmetallic elements usually fused together or dissolving into each other when molten  ( alloy , metal )
   a mixture containing two or more metallic elements or metallic and nonmetallic elements usually fused together or dissolving into each other when molten
    Brass is an alloy of zinc and copper
   brass is an alloy of zinc and copper
   
   

verb

1. (metallurgy) make an alloy of  ( alloy )
   (metallurgy) make an alloy of
   
2. (metallurgy) lower in value by increasing the base-metal content  ( alloy , debase )
   (metallurgy) lower in value by increasing the base-metal content