Runoff voting

Runoff voting can refer to:

• Two-round system, a voting system used to elect a single winner, whereby only two candidates from the first round continue to the second round
• Instant-runoff voting, an electoral system whereby voters rank the candidates in order of preference
• Contingent vote, a two-round system of instant-runoff voting.
• Exhaustive ballot, a reiterative voting system whereby rounds of voting continue (with or without elimination) until one candidate achieves a majority, also called repeated balloting