Definition of: Republican party

1. One of the two major political parties of the United States, founded in 1854 in opposition to the extension of slavery.
2. The political party founded by Thomas Jefferson in 1792: full name, Democratic-Republican party. One of its several factions became, in 1828, the present Democratic party.
3. One of various political parties of foreign countries, devoted to the overthrow of monarchy or the establishment or extension of democratic ideals.