Did you know?

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

adult

 - definition
 
 
Close

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.

Close

Thesaurus

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.

more
adjective British English pronunciation: adult /ˈædʌlt/ British English pronunciation: adult /əˈdʌlt/

Related dictionary definitions

  1. 1
    [only before noun] your adult life is the whole period of your life after you have become an adult

    She was born in Vietnam but has spent most of her adult life in the US.

    1. a.
      involving people who are adults

      59% of the adult population

      a book enjoyed by young and adult readers

  2. 3
    sensible or serious

    Can you try and be a little more adult about this?

dark pool

a method of financial trading in which share prices are hidden and not openly available to the public

BuzzWord Article

Word of the Day

alms

money, food, or clothes given to poor people

Open Dictionary

subtweet

to post a tweet, usually a negative one, that mentions a person without using the @ sign, so that they will not see the message on their Twitter feed …

add a word

Blog

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