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 uninomial system

Type of: electoral system, voting system

• Convallaria majalis
• Convallariaceae
• convect
• one-fifth
• one-flowered pyrola
• one-flowered wintergreen
• one-fourth
• one-half
• one-handed
• one-hitter
• one-horse
• one-horse town
• one-humped
• one-hundred-millionth
• one-hundred-thousandth
• one-hundredth
• one-liner
• one-man
• one-man rule
• one-member
• one-millionth
• one-night stand
• one-ninth
• one-off
• one-on-one