Definition of walk–off
: ending a baseball game immediately by causing the winning run to score for the home team in the bottom of the last inning <a walk–off homer>; also : won by the home team in the bottom of the last inning <a walk–off win>
First Known Use of walk–off
Seen and Heard
What made you want to look up walk–off? Please tell us where you read or heard it (including the quote, if possible).