Did you know?

Click any word in a definition or example to find the entry for that word

knock down - definition and synonyms


What are red words?

90% of the time, speakers of English use just 7,500 words in speech and writing. These words appear in red, and are graded with stars. One-star words are frequent, two-star words are more frequent, and three-star words are the most frequent.



The thesaurus of synonyms and related words is fully integrated into the dictionary. Click on the thesaurus category heading under the button in an entry to see the synonyms and related words for that meaning.

phrasal verb [transitive]
Word Forms
present tense
I/you/we/theyknock down
he/she/itknocks down
present participleknocking down
past tenseknocked down
past participleknocked down
  • Facebook
  • Twitter
  1. 2

    knock down


    knock over

    British to hit someone with a vehicle so that they are injured or killed

    Sue was knocked down just yards from her home.

  2. 3
    informal to reduce a price or amount

    They knocked the price of a glass of wine down to $1.45.

  3. 4
    to show that something such as an idea or suggestion is not good or useful

    It was a theory that was easily knocked down.

See also main entry: knock


to fall over forwards so that your face hits the ground or another surface

BuzzWord Article

Open Dictionary


the activity of exploring abandoned buildings and other manmade structures

add a word


A must for anyone with an interest in the changing face of language. The Macmillan Dictionary blog explores English as it is spoken around the world today.

global English and language change from our blog
Macmillan learn live love play