Lusaka lu·saka UK/luːˈsɑːkə/ US/luˈsɑkʌ/ uncommon noun 1. the capital and largest city of Zambia Synonymscapital of Zambia Related words Broader terms national capital Parts Zambia WordNet 2.1 (Princeton University). Wiktionary (CC BY-SA). CMU Pronouncing Dictionary. WordNet 2.1 Copyright Princeton University. All rights reserved.