(biology) An invasive organism, such as an animal or plant.

Of or pertaining to invasion; offensive.

(military, also figuratively) That invades a foreign country using military force; also, militarily aggressive.

Intrusive on one's privacy, rights, sphere of activity, originating externally, growing uncontrollably in environments without natural enemies, involving the entry of an instrument into the body, and describing a carcinoma or abnormal growth that invades healthy tissue rapidly.