- invasion - the act of invading; the act of an army that invades for conquest or plunder
--1 is a kind of penetration, incursion
--1 has particulars: inroadDerived form: verb invade1 - invasion, encroachment, intrusion - any entry into an area not previously occupied; "an invasion of tourists"; "an invasion of locusts"
--2 is a kind of entrance, entering
Derived forms: verb invade2, verb invade3 - invasion - (pathology) the spread of pathogenic microorganisms or malignant cells to new sites in the body; "the tumor's invasion of surrounding structures"
--3 is a kind of spread, spreading
Derived form: verb invade4