[n] an advocate of federalism
[n] a member of a former political party in the United States that favored a strong centralized federal government
\Fed"er*al*ist\, n. [Cf. F. f['e]d['e]raliste.] An advocate of confederation; specifically (Amer. Hist.), a friend of the Constitution of the United States at its formation and adoption; a member of the political party which favored the administration of president Washington.