subelection

Example:The presidential race will require a run-off if no candidate wins the majority of votes in the first round.

Definition:An additional vote or election to determine the winner between two or more candidates that have the most votes in an initial election, often held when no candidate receives a clear majority.

Example:The by-election for the vacant Senate seat saw a candidate from a minor party win with a narrow margin.

Definition:A special election to fill a vacant seat or position, often occurring when the incumbent is no longer in office.