Did you know?

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

aortic valve disease - definition and synonyms

Close

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 medical
  1. From our crowdsourced Open Dictionary
    a ​condition in which the ​valve between the ​heart and the ​aorta does not work properly
    Submitted by Caleb Judy from United States on 02/01/2016
quiz invitation
BuzzWord

webrooming

the practice of looking at a product online before going to a conventional store to buy it

BuzzWord Article

Open Dictionary

panjandrum

a person who has or claims to have a lot of influence

add a word

Blog

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