Definition of invade

• v. t. - To go into or upon; to pass within the confines of; to enter; -- used of forcible or rude ingress.
• v. t. - 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.
• v. t. - To attack; to infringe; to encroach on; to violate; as, the king invaded the rights of the people.
• v. t. - To grow or spread over; to affect injuriously and progressively; as, gangrene invades healthy tissue.
• v. i. - To make an invasion.