knock down

verb

1. To hit or collide with

   “As I took the can off the shelf, I knocked down the one beside it.”

   “He was out tomcatting one night / When he started a big fight / And a big policeman came and knocked him down.”

2. To hit or collide with

   “We knocked down the garden shed when we moved.”

3. To hit or collide with

   “They knocked it down by another £5, so we bought it.”

4. To hit or collide with

   “The furniture is shipped knocked down, so assembly is required.”

5. To acquire money, especially illicitly
6. To acquire money, especially illicitly
7. To drink or party

   “I love to go down the pub and knock down pints of lager.”

8. To drink or party
9. To choose, declare or approve.

   “They click their glasses and knock down the toast.”

10. To choose, declare or approve.
11. To choose, declare or approve.
12. To choose, declare or approve.

    “The judge knocked the award down to a half-million.”

13. To choose, declare or approve.
14. To choose, declare or approve.

    “The picture was knocked down for £50.”

15. To choose, declare or approve.

    “She had to wait for the end of the sale before these matters were put up, and as the auctioneer was in a hurry to get the sale over, and most of the bidders had left, she got a full set of servant's bedroom furniture knocked down to her for five pounds[.]”

16. To send a stop signal to ensure a train is signalled to stop at the correct point.
17. To reduce the burning of (a fire), as by cooling it with water or dirt.