Did you know?

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

informal - 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.

adjective informal pronunciation in American English /ɪnˈfɔrm(ə)l/
  • Facebook
  • Twitter
  1. 1
    informal talks or meetings are relaxed, do not involve many people, and do not need to produce an official result

    The informal meetings at Camp David were important in strengthening mutual understanding and trust.

    Synonyms and related words
    1. a.
      an informal organization, group, or arrangement is not official and has no fixed rules

      informal networks within the community

      They cooperate with other groups on an informal basis.

  2. 2
    relaxed and friendly

    It was very informal – more of a chat than an interview.

    The hotel has an informal atmosphere.

    1. a.
      used about language or behavior that is appropriate for using with friends but not in formal situations

      phrases that the students used in informal conversation

      Beware of being too friendly and informal with your employees.

    2. b.
      used about the type of clothes that you wear at home or to relax

derived words


Synonyms and related words
Synonyms and related words


 informal pronunciation in American English /ˌɪnfɔrˈmæləti/ noun [uncountable]


to fall over forwards so that your face hits the ground or another surface

BuzzWord Article

Open Dictionary


the activity of exploring abandoned buildings and other manmade structures

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
Macmillan learn live love play