noun
winning margin; difference in finishing times
Used in racing contexts, especially horse racing, where the margin is often expressed in lengths. The term refers to the gap between competitors at the finish.
そのレースの着差はわずかハナ差だった。
The winning margin in that race was just a nose.
着差が大きいほど、勝った馬の強さが際立つ。
The larger the winning margin, the more the winning horse's strength stands out.