drop off

Short definition from Wiktionary

Verb

1. 1
   To fall asleep.
2. 2
   To deliver; to deposit or leave; to allow passengers to alight.
3. 3
   To fall off: To drop from, fall from.
4. 4
   To fall off: To drop, fall.
5. 5
   To end a connection with a telephone queue, either by hanging up or after being served or processed.
6. 6
   To lessen or reduce.
7. 7
   To die.
8. 8
   To abandon or give up on (something); to be abandoned or given up on.

Noun

1. 1
   A sudden downward slope or cliff.
2. 2
   A sudden downward slope or cliff: The precipitous outer side of a coral reef, facing the open sea.
3. 3
   A decrease; especially, a sudden one.
4. 4
   A delivery; the act of leaving a package, etc.
5. 5
   A space reserved outside a bus or railway station for vehicles stopping to drop off passengers for onward transit.
6. 6
   A time during which passengers, such as school children, are dropped off; the event or act of dropping them off.
7. 7
   A visitor to a website who ceases to continue using and navigating around the site after reaching some specified page; or such an act of cessation.