reform bill

noun English History.

1. any of the bills passed by Parliament (1832, 1867, 1884) providing for an increase in the number of voters in elections for the House of Commons, especially the bill of 1832 by which many rotten boroughs were disfranchised.

noun

1. British history any of several bills or acts extending the franchise or redistributing parliamentary seats, esp the acts of 1832 and 1867