A military action consisting of armed forces of one geopolitical entity entering territory controlled by another such entity, generally with the objective of conquering territory or altering the established government.

plural of invasion

Of or pertaining to invasion; offensive. / (military, also figuratively) That invades a foreign country using military force; also, militarily aggressive.

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

plural of invasive

The quality of being invasive

In an invasive manner.

(uncountable) The condition of being invasive / (countable) The degree to which something is invasive

(biology) Capable of being invaded by invasive species

The condition of being invasible