ag·gres·sion /əˈgrɛʃən/ 名詞
Ag·gres·sion n. The first attack, or act of hostility; the first act of injury, or first act leading to a war or a controversy; unprovoked attack; assault; as, a war of aggression. “Aggressions of power.”
Syn: -- Attack; offense; intrusion; provocation.
n 1: a disposition to behave aggressively
2: a feeling of hostility that arouses thoughts of attack [syn:
3: violent action that is hostile and usually unprovoked [syn:
4: the act of initiating hostilities
5: deliberately unfriendly behavior