Du Bois du·bois US/ˈduˈbɔɪs/ uncommon noun 1. United States civil rights leader and political activist who campaigned for equality for Black Americans (1868-1963) SynonymsDu BoisW. E. B. Du BoisWilliam Edward Burghardt Du Bois Related words Broader terms civil rights leader WordNet 2.1 (Princeton University). CMU Pronouncing Dictionary. WordNet 2.1 Copyright Princeton University. All rights reserved.