Did you know?

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

antioxidant  - 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.

Close

Thesaurus

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.

more
noun [countable] chemistry antioxidant pronunciation in American English /ˌæntaɪˈɑksɪdənt/antioxidant pronunciation in American English /ˌæntiˈɑksɪdənt/
Word Forms
Close
singularantioxidant
pluralantioxidants
  1. a substance that prevents oxygen from combining with other substances and damaging them. Antioxidants are used in industry for making substances such as rubber and plastic stronger, and they are often added to processed foods to make them stay fresh for longer.

rat tail

a type of hairstyle which has a long, thin strip of hair growing down the back of the neck

BuzzWord Article

Open Dictionary

speak human

(of a politician) to be able to communicate and connect with ordinary people

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