drop off

[drop off] {v.} 1. To take (someone or something) part of the way you are going.

Joe asked Mrs. Jones to drop him off at the library on her way downtown.

2. To go to sleep.

Jimmy was thinking of his birthday party as he dropped off to sleep.

3. To die.

The patient dropped off in his sleep.

4. or [fall off] To become less.

Business picked up in the stores during December, but dropped off again after Christmas.

Contrast PICK UP (14).