copal Syllabification: (co·pal)Pronunciation: /ˈkōpəl/Definition of copal noun resin from any of a number of tropical trees, used to make varnish. The resin is obtained from trees in the families Leguminosae (genera Guibourtia, Copaifera, and Trachylobium) and Araucariaceae (genus Agathis) Origin: late 16th century: via Spanish from Nahuatl copalli 'incense'copal in other Oxford dictionaries Definition of copal in the British & World English dictionary