staple - definition and synonyms

noun [countable] 

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  1. 1
    a small piece of wire that you press through pieces of paper with a small object called a stapler so that the ends of the wire bend over and fasten the pieces of paper together
    1. a.
  2. 2
    an important product, especially a food, that people eat or use regularly

    The shops are running out of staples such as rice and cooking oil.

    1. a.
      a regular and important part or feature of something
      staple of:

      The black dress was an enduring staple of Diana’s wardrobe.