hammer - definition and synonyms

noun [countable] 

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  1. 1

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    a tool used for hitting things or forcing nails into wood that consists of a handle and a heavy metal top with one flat side

    He smashed a hole in the window with a hammer.

    take a hammer to something (=hit something hard using a hammer):

    She took a hammer to the headlamps of his car.

  2. 2
    a heavy metal ball fixed to a chain and thrown as a sport
    1. a.

      the hammer

      a sports event in which people throw a hammer as far as they can
  3. 3
    the part of a gun that pushes against the bullet to make the explosion when you pull the trigger with your finger
     Synonyms and related words
  4. 4
    a part in a piano that hits the strings to make a sound
  5. 5
    medical the malleus in the ear