n.[U][C]

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

   法國自身也受到入侵的威脅。

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

   我反對這些侵擾我私生活的行徑。

3. 擁入，侵佔
   invasions of tourists

   紛至沓來的旅遊者

4. （疾病等的）侵襲
   an invasion of cholera

   霍亂的侵襲

n.

▸an unwelcome intrusion into another's domain:

an unwarranted invasion of privacy.