The phrasal verb "drop off" is primarily used in informal speech and writing, although it may occasionally appear in formal contexts, especially in general business communication. It has several meanings based on context: it can mean to decline or decrease, such as "sales have dropped off," to deliver someone or something, as in "I will drop you off at the station," or to fall asleep, like "I dropped off during the lecture." This versatility makes it a common part of everyday vernacular, often employed in conversations about logistics, travel, commerce, and routine activities. The context of usage dictates its meaning, so it’s essential to consider the surrounding conversation for accurate interpretation. "Drop off" is a separable phrasal verb, which means objects can be placed between "drop" and "off," as in "drop the package off." Its informal tone makes it less suitable for highly formal documents like legal texts or academic writing unless used metaphorically or in quoted speech.
B1
PreIntermediate
1. To leave someone or something in a particular location, often by vehicle.
I need to drop off the kids at school before I head to work.
Can you drop me off at home after the party?
2. To fall asleep gradually or without intending to.
I was so tired that I dropped off as soon as I sat on the couch.
He dropped off during the movie because it was so late.
3. To decrease in level, amount, or number.
Sales tend to drop off after the holiday season.
Attendance at the concert dropped off significantly compared to last year.