What is "invasive vs noninvasive"

Aggressive \Ag*gres"sive\, a. [Cf. F. agressif.]

1. Tending or disposed to aggress; having or showing determination and energetic pursuit of one's own ends at the expense of others or mindless of others' needs or desires; characterized by aggression; making assaults; unjustly attacking; as, an aggressive policy, war, person, nation; an aggressive businessman; an aggressive basketball player; he was aggressive and imperious in his convictions; aggressive drivers. Opposite of unaggressive.

   No aggressive movement was made.
   --Macaulay.

2. marked by self-confident ambition, competitiveness, energy and initiative; as, an aggressive young executive.

   Syn: enterprising, pushful, pushing, pushy

3. 1 (Med., Biol.) tending to spread quickly an aggressive tumor [Narrower terms: invasive (vs. noninvasive) ]

   Syn: fast-growing(prenominal)

4. characteristic of an enemy or one eager to fight aggressive acts against another country

   Syn: belligerent

   Note: Narrower related terms: {bellicose, combative, pugnacious, scrappy, truculent ; {hard-hitting, high-pressure ; {hostile (used of attempts to buy or take control of a business: "hostile takeover"; "hostile tender offer"); predatory, rapacious, raptorial, ravening, vulturine, vulturous . See also: assertive, hostile, offensive. [WordNet 1.5] -- {Ag*gres"sive*ly, adv. -- Ag*gres"sive*ness, n.

fast-growing \fast-growing\ adj. tending to spread quickly; -- used mostly of plants.

Syn: aggressive.