1. Based on the principle of having only one member (as of a legislature) selected from each electoral district
   - uninominal system, uninominal voting system, single-member system, scrutin uninominal voting system

Type of: electoral system, voting system

• roadie
• roadkill
• roadless
• roadman
• roadrunner
• roads
• roadside
• roadstead
• roadster
• roadway
• roadwork
• roadworks
• roadworthiness
• roadworthy
• Roald Amundsen
• Roald Hoffmann
• roam
• roamer
• roan
• Roanoke
• roar
• roar off
• roarer
• roaring
• roast