invade

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invade

(ĭn-vād′)
v. in·vaded, in·vading, in·vades
v.tr.
1. To enter by force in order to conquer or pillage: The Romans invaded Britain.
2. To enter as if by invading; overrun or crowd: Each weekend, skiers invade the mountain town.
3. To enter and proliferate in bodily tissue, as a pathogen: Bacteria have invaded the lungs.
4. To encroach or intrude on; violate: invade someone's privacy.
v.intr.
To make an invasion: The cancer had invaded deeply into his liver.

in·vad′er n.