Did you know?

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

de facto - 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.

Thesaurus diagram

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.

adjective formal     de facto pronunciation in British English
/deɪ ˈfæktəʊ/    de facto pronunciation in British English
/diː ˈfæktəʊ/
Related words
  1. 1
    actual, even though not official

    English is the de facto language of the computer industry.

  2. 2
    Australian a de facto relationship is between two people who are officially recognized as partners without being legally married to each other

deep learning

a form of machine learning which incorporates the use of neural networks

BuzzWord Article

Open Dictionary

snap election

a general election … that is called earlier than expected

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