Did you know?

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

reduction - 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.

noun reduction pronunciation in American English /rɪˈdʌkʃən/
Word Forms
  • Facebook
  • Twitter
  1. 1
    [countable/uncountable] the process or result of making something smaller or less in amount, size, importance, etc.
    reduction in:

    There has been a dramatic reduction in the birth rate.

    reduction of:

    The treaty committed each side to a reduction of 30 percent in its stock of weapons.

  2. 2
    [countable] the amount by which the price of something is reduced
    reduction for:

    $70 reduction for all guests staying 14 nights in June

  3. 3
    [countable] a copy of a photograph, picture, etc. that is smaller than the original

sea lion

in an online conversation, repeatedly asking a person questions which suggest that you are interested in what they are talking about, but are actually intended to annoy them

BuzzWord Article

Open Dictionary


an electric skateboard

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