[n] violent action that is hostile and usually unprovoked
[n] deliberately unfriendly behavior
[n] the act of initiating hostilities
[n] a disposition to behave aggressively
[n] a feeling of hostility that arouses thoughts of attack
action, aggravation, armed combat, behavior, behaviour, bitchery, bullying, combat, conduct, doings, enmity, force, hell raising, hostility, ill will, intimidation, irritation, meat grinder, pillage, pillaging, plundering, provocation, raising hell, self-assertion, unfriendliness, violence, war, warfare
\Ag*gres"sion\, n. [L. aggressio, fr. aggredi: cf. F. agression.] 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.'' --Hallam Syn: Attack; offense; intrusion; provocation.