Dictionary definition for: Invasion
1. (n) the act of invading; the act of an army that invades for conquest or plunder
2. (n) any entry into an area not previously occupied; "an invasion of tourists" "an invasion of locusts"
3. (n) (pathology) the spread of pathogenic microorganisms or malignant cells to new sites in the body; "the tumor''s invasion of surrounding structures"
WordNet 2.1 Copyright Princeton University. All rights reserved.
