I believe this definition is more accurate/common, but correct me if I'm wrong. I've left the old version at the bottom of this page for comparison. --DanKeshet
An election system where competing factions share seats in an assembly according to the proportion of votes they received. The number of seats they each receive determines the number of votes they get when voting on decisions. This is the most common method for electing legislative assemblies or parliaments in modern democracies.