sweet gum sweet·gum uncommon noun 1. reddish-brown wood and lumber from heartwood of the sweet gum tree used to make furniture Synonymssweet gumsatin walnuthazelwoodred gum 2. aromatic exudate from the sweet gum tree Synonymssweet gumliquidambar 3. a North American tree of the genus Liquidambar having prickly spherical fruit clusters and fragrant sap Synonymssweet gumsweet gum treebilstedred gumAmerican sweet gumLiquidambar styraciflua Related words Word family sweet gum tree Broader terms liquidambargumgumwood Parts genus Liquidambarsweet gum Part of sweet gum WordNet 2.1 (Princeton University). WordNet 2.1 Copyright Princeton University. All rights reserved.