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noun [countable]     pin pronunciation in American English
Word Forms
  1. 2
    a piece of jewelry that you wear on your clothes. The British word is brooch.
    1. a.
      a thin pointed piece of metal worn on your clothes as jewelry 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 bowling
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to manipulate someone psychologically so that they begin to question their own perceptions and memories

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Dunning-Kruger effect

the phenomenon by which an incompetent person is too incompetent to understand his own incompetence

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