knock down

verb21

1. •
   To hit or collide with
2. •
   to hit someone or something so that they fall to the ground

   • As I took the can off the shelf, I knocked down the one beside it.
3. •
   to destroy a building or other structure on purpose by breaking it apart

   • We knocked down the garden shed when we moved.
4. •
   (informal) to lower the price of something that is for sale

   • They knocked it down by another £5, so we bought it.
5. •
   At an auction, to declare (something) sold with a blow from the gavel.

   • The picture was knocked down for £50.
   • The auctioneer knocked it down at £50.
6. •
   to sell something at an auction by declaring it sold to the person offering the most money, usually with a hit of a gavel
7. •
   (informal) to drink something quickly, often alcohol such as beer

   • I love to go down the pub and knock down pints of lager.
8. •
   to use greater authority to reject a decision that someone else has made

   • The judge knocked the award down to a half-million.
9. •
   to take apart something such as furniture so that it can be packed and sent more easily and put together again later

   • The furniture is shipped knocked down, so assembly is required.
10. •
    to make a fire burn less strongly, often by putting water or soil on it
11. •
    To drink or party
12. •
    To choose, declare or approve.
13. •
    To acquire money, especially illicitly
14. •
    To accumulate money, usually through crime.
15. •
    To embezzle.
16. •
    (Australia, slang) to spend money freely on a celebration, often all of one's pay at once
17. •
    To approve a drinking toast by banging glasses on the table.

    • They click their glasses and knock down the toast. — 1954
18. •
    To sentence (someone) to prison or other sentence.
19. •
    (Australia, New-Zealand) to introduce one person to someone else, most often to a woman
20. •
    (old-fashioned) To send a stop signal to ensure a train is signalled to stop at the correct point.
21. •
    (no longer used) to choose someone and ask them to speak, often at a meeting