Did you know?

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

pin - 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.

Thesaurus diagram

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 [countable]     pin pronunciation in British English
Word Forms
  1. 2
    mainly American a piece of jewellery that you wear on your clothes. The British word is brooch.
    1. a.
      a thin pointed piece of metal worn on your clothes as jewellery or worn to hold something in place

      His tie was held in place with a small diamond pin.

  2. 3
    a thin piece of metal or wood, used especially to hold things together
    1. b.
      the metal part that a soldier pulls out of a hand grenade before throwing it
    2. c.
      a thin piece of metal that a doctor puts through a broken bone to support it
  3. 4
    one of the tall objects that you knock over in the game of ten-pin bowling
    Synonyms and related words
  4. 5


    [plural] British informal old-fashioned someone’s legs

    She’s still a bit shaky on her pins.

  • Facebook
  • Twitter


a rainbow produced when water droplets in the air reflect light from the moon rather than the sun

BuzzWord Article

Open Dictionary

platform capitalism

a way of doing business that involves recruiting large numbers of people who work for themselves using the company's platform, as used by companies such as Uber, Deliveroo and the like

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