Did you know?

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

back - definition and synonyms

 
 
 
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. Click on the thesaurus category heading under the button in an entry to see the synonyms and related words for that meaning.

more
noun [countable] back pronunciation in American English /bæk/
Word Forms
Close
singularback
pluralbacks
  • Facebook
  • Twitter
  1. 1
    the part of your body between your neck and your bottom, on the opposite side to your chest and stomach. The row of bones inside the back is called the backbone or spine
    Will you scratch my back for me?
    He’s broken his back, but he’s still alive.
    (flat) on your back: She was lying flat on her back on the bed.
  2. 2
    the part of something that is farthest from the front
    back of: Get in the back of the car.
    The sun burned the back of my neck.
    in back American: a cotton dress with a bow in back
    1. a.
      the part of a chair that you lean on when you are sitting on it
      What’s that mark on the back of the sofa?
  3. 3
    an outside area behind a house or other building
    out back: The kids are playing out back.
  4. 4
    the side of a page, card, picture, etc. that is not the main side
    on the back: a concert program with Madonna’s autograph on the back
    back of: I’ll put my name on the back of the envelope.
    1. a.
      the last part of a book, newspaper, etc.
      back of: A page had been torn out of the back of the book.
      in the back: a dictionary with a list of irregular verbs in the back

phrases

nanodegree

a course of study which is much shorter than a university course and focuses on the skills you need for a job, especially computer-related skills

BuzzWord Article

Open Dictionary

hypocaust

an ancient Roman system of underfloor heating, used to heat houses with hot air; from the Latin 'hypocaustum'

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