1
- a decline or decrease下降; 减少; 衰落：
a sudden drop-off in tourism.
旅游业的突然衰退。
2
- chiefly N. Amer. a sheer downward slope; a cliff〈主北美〉陡坡; 悬崖：
dizzy drop-offs on either side.
两侧的令人头晕目眩的峭壁。
attrib.
- relating to or allowing the delivery or depositing of something（允许）交付（或存放）物品的：
the mailbags are left at drop-off points.
邮袋被留在了寄存处。