Did you know?

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

b - 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 b pronunciation in British English /biː/
Word Forms

or B b pronunciation in British English

  1. 1
    [countable] the second letter of the English alphabet. B is a consonant.
    Synonyms and related words
  2. 2


    [countable/uncountable] music the seventh note of a musical scale in C major
    Synonyms and related words
    1. a.
      [uncountable] music the musical key based on the note B
      Synonyms and related words
  3. 3


    [countable] a mark that is given in a school, college, or university for work that is a little better than average
    I got a B on my History assignment.
  4. 4


    [uncountable] medical a common blood group


… a feeling of pleasure you get from spending time doing what you want and not worrying about what other people are doing or saying

BuzzWord Article

Open Dictionary

brain fade

a temporary inability to think clearly or remember information

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