Marshall, ThurgoodMar‧shall, Thur‧good /ˈmɑːʃəl $ ˈmɑːr-, ˈθɜːɡʊdǁ-ɜːr-/(1908–93) a US lawyer who became the first black member of the Supreme Court in 1967. When he was a lawyer he won many important legal cases to help black US citizens get equal rights, such as the case of brown v. board of education of topeka.