1. TO LEAVE The delivery was dropped off at the wrong address. The bus dropped me off right in front of the building. Documents must be mailed or dropped off at the agency office. I dropped off her She dropped him off at the train station. Could you drop the kids off at school? 2. TO FALL ASLEEP She dropped off to sleep, she was so tired I dropped off while watching TV last night I kept dropping off on the sofa. I suppose I must have dropped off. 3. TO DECREASE The show's quality dropped off in its later seasons. The number of students dropped off significantly. Sales dropped off at the end of the month
