i-adjective
slightly late; just after
Describes arriving or acting a moment too late, missing something by a small margin. Often used when someone just misses an event or opportunity.
電車に一足遅くて乗れなかった。
I was slightly late and couldn't catch the train.
彼が着いたときには、会議は一足遅く終わっていた。
When he arrived, the meeting had just ended a moment earlier.