Main Entry: ag·gres·sion

Pronunciation: \ə-ˈgre-shən\

Function: noun

Etymology: Latin aggression-, aggressio attack, from aggredi to attack, from ad- + gradi to step, go — more at grade

Date: 1611

1 : a forceful action or procedure (as an unprovoked attack) especially when intended to dominate or master
2 : the practice of making attacks or encroachments; especially : unprovoked violation by one country of the territorial integrity of another
3 : hostile, injurious, or destructive behavior or outlook especially when caused by frustration