Did you know?

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

altimeter - 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] altimeter pronunciation in British English /ˈæltɪˌmiːtə(r)/altimeter pronunciation in British English /ælˈtɪmɪtə(r)/
Word Forms
  1. a piece of equipment in an aircraft that tells you the height of the aircraft above sea level (=the surface of the sea)


… a language for human communication which has been invented and has not developed naturally

BuzzWord Article

Open Dictionary


spectacles; boiled sweets, candy; soft aniseed-flavoured jelly sweets coated with blue and pink sugar sprinkles

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