Dictionary.com
Thesaurus.com
Synonyms

knock down

British  

verb

  1. to strike to the ground with a blow, as in boxing

  2. (in auctions) to declare (an article) sold, as by striking a blow with a gavel

  3. to demolish

  4. to dismantle, for ease of transport

  5. informal to reduce (a price, etc)

  6. slang to spend (a cheque)

  7. slang to drink

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

adjective

  1. overwhelming; powerful

    a knockdown blow

  2. cheap

    I got the table at a knockdown price

  3. easily dismantled

    knockdown furniture

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

noun

  1. slang an introduction

    will you give me a knockdown to her?

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
knock down Idioms  
  1. Take apart for storage or shipping, as in We need to knock down this chest to ship it safely overseas . [Mid-1900s]

  2. Declare sold at an auction, as by striking a blow with a gavel. For example, That was the last bid, and the first edition was knocked down for only three hundred . [Mid-1700s]

  3. Reduce the price of, as in They knocked it down by another hundred dollars , or An overabundant harvest will knock down corn prices . [ Colloquial ; mid-1800].

  4. Earn as wages, as in She knocks down a hundred grand a year . [ Slang ; 1920s]

  5. Steal, embezzle, as in He was caught knocking down the box-office receipts . This usage may be obsolescent. [ Slang ; mid-1800s] Also see knock over , def. 2.


Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

Trump has denied that he plans to knock down the center, and earlier Friday he posted two renderings on social media of what it would look like when it was refurbished.

From Barron's • Mar. 13, 2026

Fire Department incident report said firefighters were able to knock down the fire in 73 minutes.

From Los Angeles Times • Mar. 7, 2026

On one hand, AI assistants knock down barriers to entry.

From The Wall Street Journal • Mar. 5, 2026

Demolition teams arrived at 22 North End Avenue in Thorpeness on Monday ready to knock down what will be the fourth property in the Suffolk village this winter.

From BBC • Jan. 13, 2026

The skilled orator is out not necessarily to knock down his opponent’s case tout court—but to misrepresent his opponent’s case in such a way as to make it easier to attack.

From "Words Like Loaded Pistols" by Sam Leith