blood - definition and synonyms

noun [uncountable] 

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  1. 1
    the red liquid that flows around inside your body

    Oxygen and other vital substances are all carried in the blood.

    His face was covered in blood.

    give/donate blood (=allow doctors to take blood from your body so that it can be given to someone who needs it):

    Have you ever given blood?

  2. 2
    the family, nation, or group that you belong to through your parents and grandparents

    They had royal blood in their veins.

    Like many Canadians, she had some Scottish blood.

  3. 3
    used as a way of referring to violence and death

    Peace finally came, but a great deal of blood was lost in the process.

    have blood on your hands (=be responsible for someone’s death or for many deaths):

    a ruthless general with blood on his hands