vi to make an invasion.
2. invade ·vt to grow or spread over; to affect injuriously and progressively; as, gangrene invades healthy tissue.
3. invade ·vt to go into or upon; to pass within the confines of; to enter;
used of forcible or rude ingress.
4. invade ·vt to attack; to infringe; to encroach on; to violate; as, the king invaded the rights of the people.
5. invade ·vt to enter with hostile intentions; to enter with a view to conquest or plunder; to make an irruption into; to attack; as, the romans invaded great britain.