invasion

Meanings

1. 1
   noun

   (pathology) the spread of pathogenic microorganisms or malignant cells to new sites in the body

   the tumor's invasion of surrounding structures

2. 2
   noun

   any entry into an area not previously occupied

   an invasion of tourists

3. 3
   noun

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

   Since Michel's days, however, many barbarian invasions had subdivided the Three Gauls into a melange of warsome states and tribes, all, nevertheless, acquiring a vaguely similar grace, if not a petite grandeur.

4. 4
   noun

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

   an invasion of mobile phones

5. 5
   noun

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

   The histological diagnosis of PC is currently restricted to lesions showing unequivocal extra-parathyroidal growth, as evidenced by perineural invasion, full thickness capsular invasion with growth into adjacent tissues, extratumoral vascular invasion, or metastasis.

6. 6
   noun

   the act of invading

7. 7
   noun

   The breaching of the skin barrier.

Etymology

From Middle French invasion, from Late Latin invāsiōnem, accusative of invāsiō.