Older New York Times article that bears re-posting.
"..All the misdiagnosis of bullying is making the real but limited problem seem impossible to solve. If every act of aggression counts as bullying, how can we stop it? Down this road lies the old assumption that bullying is a rite of childhood passage. But that’s wrong.
Bullying is a particular form of harmful aggression,
linked to real psychological damage, both short and long term.
...The definition of bullying adopted by psychologists is physical or verbal abuse, repeated over time, and involving a power imbalance. In other words, it’s about one person with more social status lording it over another person, over and over again, to make him miserable..."