invasions

noun

1. 1

   A military action consisting of armed forces of one geopolitical entity entering territory controlled by another such entity, generally with the objective of conquering territory or altering the established government.

2. 2

   The entry without consent of an individual or group into an area where they are not wanted.

   “an invasion of bees”

3. 3

   The spread of cancer cells, bacteries and such to the organism.

4. 4

   The breaching of the skin barrier.