invasive

Short definition from Wiktionary

Adjective

1. 1
   Of or pertaining to invasion; offensive.
2. 2
   That invades a foreign country using military force; also, militarily aggressive.
3. 3
   Intrusive on one's privacy, rights, sphere of activity, etc.
4. 4
   Originating externally.
5. 5
   Of an animal or plant: that grows (especially uncontrollably) in environments which do not harbour natural enemies, often to the detriment of native species or of food or garden flora and fauna.
6. 6
   Of a procedure: involving the entry of an instrument into part of the body.
7. 7
   Of a carcinoma or other abnormal growth: that invades healthy tissue, especially rapidly.

Noun

1. 1
   An invasive organism, such as an animal or plant.