AGGRESSIVE
aggressive
(adjective) having or showing determination and energetic pursuit of your ends; “an aggressive businessman”; “an aggressive basketball player”; “he was aggressive and imperious; positive in his convictions”; “aggressive drivers”
aggressive, belligerent
(adjective) characteristic of an enemy or one eager to fight; “aggressive acts against another country”; “a belligerent tone”
aggressive, fast-growing, strong-growing
(adjective) tending to spread quickly; “an aggressive tumor”
Source: WordNet® 3.1
Etymology
Adjective
aggressive (comparative more aggressive, superlative most aggressive)
Characterized by aggression; unjustly attacking; prone to behave in a way that involves attacking or arguing.
(programming) Of heuristics, source code optimization techniques, etc.: exploiting every opportunity to be applied.
(pathology, of a tumour or disease) That spreads quickly or extensively; virulent; malignant.
Synonyms
• See also combative
Antonyms
• passive
Source: Wiktionary
Ag*gres"sive, a. [Cf. F. agressif.]
Definition: Tending or disposed to aggress; characterized by aggression;
making assaults; unjustly attacking; as, an aggressive policy, war,
person, nation. -- Ag*gres"sive*ly, adv. -- Ag*gres"sive*ness, n.
No aggressive movement was made.
Macaulay.
Source: Webster’s Unabridged Dictionary 1913 Edition