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Invade

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

Synonym: to attack, assail, encroach upon. See attack.

Origin: L. Invadere, invasum; pref. In- in _ vadere to go, akin to E. Wade: cf. OF. Invader, f. Envahir. See Wade.