In·vade v. t. [imp. & p. p. Invaded; p. pr. & vb. n. Invading.]
1. To go into or upon; to pass within the confines of; to enter; -- used of forcible or rude ingress. [Obs.]
Which becomes a body, and doth then invade
The state of life, out of the grisly shade. --Spenser.
2. 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.
Such an enemy
Is risen to invade us. --Milton.
3. To attack; to infringe; to encroach on; to violate; as, the king invaded the rights of the people.
4. To grow or spread over; to affect injuriously and progressively; as, gangrene invades healthy tissue.
Syn: -- To attack; assail; encroach upon. See Attack.