Main entry: invasion
Definition: the act of invading; the act of an army that invades for conquest or plunder
Main entry: invasion
Definition: (pathology) the spread of pathogenic microorganisms or malignant cells to new sites in the body
Usage: the tumor's invasion of surrounding structures
Main entry: encroachment, intrusion, invasion
Definition: any entry into an area not previously occupied
Usage: an invasion of tourists; an invasion of locusts