1To delay or postpone something; to slow down the timing or progress of an event or action.
悪天候で出発を一日遅らすことにした。
Due to bad weather, we decided to postpone departure by one day.
工程の都合で会議の開始時刻を少し遅らす必要がある。
Due to schedule issues, it's necessary to push back the meeting's start time a bit.
薬の効果で病気の進行を遅らすことができた。
The medication was able to retard the progression of the disease.