inside - definition and synonyms

noun [countable] [usually singular] 

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  1. 1
    the inner part of something
    the inside of something:

    I had never seen the inside of a prison before.

  2. 2
    the part of something that faces inwards
    the inside of something:

    There were scratches all down the inside of my leg.

    We need to clean the inside of the windows as well as the outside.