Definition adjective Interventional
In this context, invasive refers to therapy in which mucocutaneous barriers are violated–e.g., invasive (interventional is often preferred) cardiology.
Definition adjective Diffuse, infiltrating
In this context, invasive refers to the spread of a lesion, usually understood to be cancer, beyond confining or natural tissue boundaries. As above defined, invasive can also be used for infections that spread through tissue planes.