Did you know?

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


 - definition

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 entries. Click on the T button in an entry to review the synonyms and related words for that meaning.

adjective American English pronunciation: extensive /ɪkˈstensɪv/
  1. 1
    very large in amount or degree

    The accident caused extensive damage to both cars.

    the restaurant's extensive wine list

  2. 2
    involving a lot of details and information

    She has an extensive knowledge of art history.

    Scientists have conducted extensive research into the causes of cancer.

  3. 3
    spreading over a large area

    the hotel's extensive grounds

    He suffered a broken wrist and extensive bruising.

derived words


 American English pronunciation: extensively  adverb

The building was extensively damaged by fire.


noun [uncountable]

Open Dictionary


Employed but with No Disposable Income or Savings: people who are in work but only earn just enough to live on

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