What does the term "walk-off" single mean in a softball context?

In softball, the term "walk-off" single refers to a hit that allows a team to win the game immediately in the final inning. This occurs when a player gets a hit that brings in the winning run while the game is tied or the team is trailing. The significance of a walk-off hit is that it concludes the game on that play, which often leads to the celebrating players walking off the field as victors. This term encapsulates the excitement of a sudden victory, marking it as a dramatic and memorable moment in the sport.