Did you know?

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

flash crash - 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.

noun economics
  1. From our crowdsourced Open Dictionary
    a very quick, deep, and unstable fall in securities prices in a very short period of time

    Navinder Singh Sarao faces extradition to the US over claims he helped cause the 2010 Wall Street 'flash crash'.

    Submitted from United Kingdom on 27/04/2015
quiz invitation


a description of an economic or political situation based on analysis of information at the present time

BuzzWord Article

Open Dictionary


an unregulated form of capitalism that features financial deregulation, privatisation and low tax for high earners

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