Aggression is a forceful action or procedure (as an unprovoked attack) especially when intended to dominate or master.
Another definition of aggression is hostile, injurious, or destructive behavior or outlook especially when caused by frustration. (Merriam-Webster) Merriam-Webster (n.d.). Retrieved May 7, 2015, from http://www.merriam-webster.com/dictionary/aggression |