invasion

英[ɪn'veɪʒ(ə)n] 美[ɪn'veʒn]

1. the act of invading; the act of an army that invades for conquest or plunder

2. any entry into an area not previously occupied;

"an invasion of tourists"

"an invasion of locusts"

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

"the tumor's invasion of surrounding structures"