- (idiomatic, intransitive) To fall asleep.
- After two glasses of whiskey, Tom soon dropped off in front of the television.
- (idiomatic, transitive) To deliver; to deposit or leave.
- Can you drop the kids off at school?
- I'll drop off your books when I see you tonight.
- To fall.
- The leaves were slowly dropping off the tree.
- To lessen or reduce.
- Sales have dropped off in recent months.