button - definition and synonyms

noun [countable] 

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  1. 1
    a small object that you press to make a machine start working or perform a particular action

    Just press this button to start the computer.

    Press the pause button.

    Click the left mouse button twice.

    1. b.
      computing a symbol on a computer screen that you can use to start programs

      Click on the Start button.

  2. 2
    a small round object that is used for fastening clothes by pushing it through a hole

    He had undone the top button of his shirt.

  3. 3
    a round badge that you wear on your clothes
See also