Did you know?

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

whistle - 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] whistle pronunciation in British English /ˈwɪs(ə)l/
Word Forms
  • Facebook
  • Twitter
  1. 1
    a small metal or plastic object that you put in your mouth and blow to make a high sound
    blow a whistle: The referee blew the whistle for half-time.
    a whistle goes/sounds: The whistle went for full-time.
    1. a.
      a piece of equipment that produces a high sound, used as a warning or a signal on a train or a boat, or in a place such as a factory
      a whistle blows: The whistle blew as the train prepared to leave.
  2. 2
    the sound that someone makes when they force air through their mouth
    Loud cheers and whistles greeted the team.
    give/let out a whistle: Darren gave a low whistle.
    1. b.
      the sound that you make by blowing through a whistle
      Play stopped when we heard the whistle.
      the final whistle (=used for showing that a game or competition has finished): He scored again just seconds before the final whistle.
    2. c.
      the high sound that some birds make
      the skylark’s piercing whistle
      Synonyms and related words


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