tumour - definition and synonyms

 
noun [countable] 

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/ˈtjuːmə(r)/
singulartumour
pluraltumours
  1. a mass of cells in your body that grow in a way that is not normal. A benign tumour is harmless, and a malignant tumour can cause death

    She died of a brain tumour.

    an operation to remove the tumour