knee - definition and synonyms

noun [countable] 

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  1. 1
    the part in the middle of your leg, where it bends

    Shirley sat in the corner, hugging her knees.

    We were up to our knees in mud.

    a serious knee injury

    fall/drop etc to your knees (=put your knees on the ground):

    He dropped to his knees and started praying.

    1. a.
      the part of a pair of trousers that covers your knee

      His jeans had holes in both knees.

       Synonyms and related words
  2. 2
    the upper part of your leg when you are sitting down, where you can hold a child or an object