Did you know?

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

defeat device - 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.

  1. From our crowdsourced Open Dictionary
    a piece of equipment which senses when a machine is being tested to make sure it meets emissions standards. The device switches on when the machine is being tested and off when it is operating normally, leading to higher levels of harmful emissions being produced than when the machine is being tested.

    This is the first time that VW has revealed how many of the 11m cars that were fitted with a defeat device to cheat emissions tests were in the UK.

    Submitted from United Kingdom on 23/09/2015


a rainbow produced when water droplets in the air reflect light from the moon rather than the sun

BuzzWord Article

Open Dictionary

platform capitalism

a way of doing business that involves recruiting large numbers of people who work for themselves using the company's platform, as used by companies such as Uber, Deliveroo and the like

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