aggression /əˈɡɹɛʃən/ noun5 •The act of initiating hostilities or invasion.Control, dispossession, violence, and tyranny are not “defensive”: they are part of an organized, ongoing aggression. — 2019 •The practice or habit of launching attacks. •Hostile or destructive behavior or actions.The decision to impose a steel and aluminum tariff is an act of aggression which makes trade war between the two pillars of the West a grim possibility. — 2018 •The initiation or threat of conflict; coercion. •A desire for confrontation and often violence; an urge to physically harm something or someone. formsaggressions