n. 武装入侵( invasion的复数形式 ); （尤指烦扰的）涌入; 侵犯; 干预

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

n. any entry into an area not previously occupied

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