Did you know?

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

sky - 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] sky pronunciation in British English /skaɪ/
Word Forms
  • Facebook
  • Twitter
  1. the space above the earth that you see when you look up into the air
    At noon the sun is directly above us in the sky.
    Air pollution is clearly visible in the skies over the city.
    a clear blue sky
    the night/summer/northern sky (=how the sky looks at a particular time, season, or place): The night sky was filled with stars.
    a patch/strip of sky (=a small area of the sky): a patch of blue sky among the clouds
    1. a.
      [usually plural] used for talking about the weather
      clear/cloudy skies: Tomorrow we expect clear skies in the morning, with rain in the afternoon.


a meal served in the evening which consists of foods traditionally eaten at breakfast

BuzzWord Article

Open Dictionary

troll factory

a company that pays its employees to write online comments in favour or against somebody or something posing as ordinary Internet users

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