INVASIVE
invasive, encroaching(a), trespassing
(adjective) gradually intrusive without right or permission; “we moved back from the encroaching tide”; “invasive tourists”; “trespassing hunters”
invasive
(adjective) marked by a tendency to spread especially into healthy tissue; “invasive cancer cells”
invasive
(adjective) relating to a technique in which the body is entered by puncture or incision
incursive, invading, invasive
(adjective) involving invasion or aggressive attack; “invasive war”
Source: WordNet® 3.1
Etymology
Adjective
invasive (comparative more invasive, superlative most invasive)
That invades a foreign country using military force.
Relating to military aggression generally.
(of a plant or animal) That grows in environments which do not harbor natural enemies, often to the detriment of native species or of food or garden flora and fauna.
(medicine) (of a carcinoma etc) That invades healthy tissue; (of a procedure) in which part of the body is entered
Intrusive on one's privacy.
Coming from outside; originating externally.
Noun
invasive (plural invasives)
An invasive organism, as, a plant or animal.
Source: Wiktionary
In*va"sive, a. Etym: [LL. invasivus: cf. F. invasif. See Invade.]
Definition: Tending to invade; characterized by invasion; aggressive.
"Invasive war." Hoole.
Source: Webster’s Unabridged Dictionary 1913 Edition