n.[U][C]

1. 入侵，侵略
   France itself was threatened with invasion.

   法国自身也受到入侵的威胁。

2. 侵害，侵犯
   I object to these invasions of my privacy.

   我反对这些侵扰我私生活的行径。

3. 拥入，侵占
   invasions of tourists

   纷至沓来的旅游者

4. （疾病等的）侵袭
   an invasion of cholera

   霍乱的侵袭

n.

▸an unwelcome intrusion into another's domain:

an unwarranted invasion of privacy.