Did you know?

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

microplastics - 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 [plural]
  1. From our crowdsourced Open Dictionary
    very small (less than 1mm) pieces of plastic waste that make their way into the environment, especially rivers and the sea

    It’s already been established that lots of marine animals low on the food chain, such as shellfish and worms, that are used to eating microscopic organisms end up eating microplastics.

    Submitted from United Kingdom on 23/09/2015


a lifestyle focussing on simple pleasures such as comfort and cosiness in the home, and spending time with friends and family

BuzzWord Article

Open Dictionary


a form of location that involves the underwater detonation of a bomb which causes sound waves that are picked up by ships

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