(ri·pub′li·kən) adjective
Pertaining to, of the nature of, or suitable for a republic; agreeable to the nature of a republic; also, of or pertaining to any party supporting republican government.
—noun One who advocates or upholds a republican form of government or belongs to a party upholding republican government; one who believes in equality and liberty.

(ri·pub′li·kən) adjective
Pertaining to or belonging to the Republican party of the United States, or to any political group which calls itself by this name: the Republican parties of Spain or France.
—noun A member of the Republican party.
—black Republican Formerly, a member of the Republican party: derisively so called in allusion to their opposition to Negro slavery.