solid - definition and synonyms

noun [countable] 

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  1. 1
    science a substance that is not a liquid or a gas
  2. 2
    maths a shape that is three-dimensional, not flat
  3.   From our crowdsourced Open Dictionary
    do someone a solid to do someone a favour

    Can you do me a solid and just walk away?

    Submitted from United Kingdom on 05/01/2016