5 definitions
Definition.com
Runoff (n.) is the election the first election failed to finish.
Definition.com
Runoff (n.) is what a plurality becomes when the rules insist on a majority.
Definition.com
Runoff (n.) is democracy's second draft, with the worst candidates edited out.
Definition.com
Runoff (n.) is a rematch in which both fighters pretend the first round did not count.
Definition.com
Runoff (n.) is the one vote where everyone's second choice gets to be somebody's first.