Home › Words › G › galvalumegalvalumegalvalume means A metal alloy coating that is composed of aluminum, zinc and silicone.Among words judged in Lexicurio's Arena, galvalume ranks #16,730 of 42,747 for Qualifying.EtymologyTrade name.nounA metal alloy coating that is composed of aluminum, zinc and silicone.Definitions & examples from Wiktionary (CC BY-SA 3.0).