also: アグレション · アグレッシン
noun
Loanword from English; used in contexts such as psychology, sports, or international relations to describe hostile or forceful behavior.
彼のアグレッションがチームの雰囲気を悪くした。
His aggression worsened the team's atmosphere.
このゲームは適度なアグレッションが求められる。
This game requires a moderate amount of aggression.
Means 'invasion' or 'aggression' in the sense of military or territorial encroachment; not a direct synonym for personal aggression.
Borrowed from English 'aggression'.