To go into or upon; to pass within the confines of; to enter; -- used of forcible or rude ingress.

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.

To attack; to infringe; to encroach on; to violate; as, the king invaded the rights of the people.

march aggressively into another's territory by military force for the purposes of conquest and occupation; "Hitler invaded Poland on September 1, 1939"

to intrude upon, infringe, encroach on, violate; "This new colleague invades my territory"; "The neighbors intrude on your privacy"