glitz I. \ˈglits\noun (-es-es-er/-est) Etymology: probably modification of German glitzern to glitter, from Middle High German glitzen; akin to Old Norse glitra to glitter : extravagant showiness : flash 4a ; also : superficial glamour • glitz·i·ness\-sēnə̇s\noun • glitzy\-sē\adjective II. transitive verb (-ed/-ing/-es) : to make flashy or extravagant < she got glitzed up for the party >