metastasis

noun

1. 1

   A change in nature, form, or quality.

2. 2

   The transference of a bodily function or disease to another part of the body, specifically the development of a secondary area of disease remote from the original site, as with some cancers.

3. 3

   The spread of a harmful event to another location, like the metastasis of a cancer.

4. 4

   Denying adversaries' arguments and turning the arguments back on them.