A single-member district is an electoral district represented by a single officeholder. It contrasts with a multi-member district, which is represented by multiple officeholders. Single-member districts are also sometimes called single-winner voting, winner-takes-all, or single-member constituencies.

What is a multi-member electoral system?

Mixed-member proportional representation (MMP or MMPR) is a mixed electoral system in which voters get two votes: one to decide the representative for their single-seat constituency, and one for a political party.

What is a constituency in an election?

The term constituency is commonly used to refer to an electoral district, especially in British English, but it can also refer to the body of eligible voters or all the residents of the represented area or only those who voted for a certain candidate.