#1
invasion n. the act of invading; the act of an army that invades for conquest or plunder
. wn #2
invasion n. [
encroachment, intrusion] any entry into an area not previously occupied; "an invasion of tourists"; "an invasion of locusts"
. wn #3
invasion n. (pathology) the spread of pathogenic microorganisms or malignant cells to new sites in the body; "the tumor's invasion of surrounding structures"
. wn