"Metastasis" means:

  1. Malignant cells or disease-producing organisms that spread to other parts of the body by way of the blood or lymphatic vessels or membranous surfaces.
  2. To spread injuriously in a socity, organisation, firm or nation. (USA)
  3. To transform, especially into a dangerous form. 
  4. To spread throughout the body like a cancer. (USA)
  5. To spread, distribute or disperse widely. (USA)
  6. To spread or grow by or as if by metastasis.
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