Did you know?

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

EPO - 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
    erythropoietin: a hormone that controls the production of red blood cells. It is also used to enhance performance in sport

    Sportsmen and women have been known to dope with the blood hormone Epo to enhance their performance.

    Submitted from United Kingdom on 11/10/2012

Open Dictionary


another way of saying congratulations, or that something/someone looks nice or fascinating

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