1. To let fall to the ground
2. To fall vertically
3. To go down in value
4. To leave or unload, esp. of passengers or cargo; SYN. set down, put down, unload.
5. To utter casually
6. To lose (said of games, in sports)
7. To stop pursuing or acting; SYN. knock off.
8. To terminate an association with
9. To give birth; used for animals
10. To change from one level to another