Did you know?

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

metabolism - 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.



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.

noun [countable/uncountable] biology metabolism pronunciation in American English /məˈtæbəˌlɪzəm/
Word Forms
  1. all the chemical processes by which cells produce the energy and substances necessary for life. Food is separated into the parts it is made up of to produce heat and energy, to repair tissues, and to help growth to happen

    exercises to speed up your metabolism



to fall over forwards so that your face hits the ground or another surface

BuzzWord Article

Open Dictionary


the activity of exploring abandoned buildings and other manmade structures

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