According to Olweus, “A student is bullied when he or she repeatedly and systematically receives violence from one or more classmates. Violence can be physical, verbal, emotional, sexual and / or cyber. At the same time, the World Health Organization points out that bullying is a multifaceted form of abuse, characterized by the repeated exposure of a person to physical and / or emotional aggression, such as teasing, nicknames, mockery, threats, harassment, ridicule, mockery, exclusion or dissemination of rumors.

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Therefore, in order for a behavior to be considered bullying, there must be an imbalance of power, in order to cause some kind of harm, to be done intentionally and repeatedly. Acts of bullying are usually planned and seriously threaten the physical and mental health of the bullied child, often leading to blame on the child himself.

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It follows from the above that a conflict between two or more children inside or outside the school environment is NOT enough to talk about bullying. More specifically, in the conflict there is an equal relationship between the members, while often the children maintain friendly relations with each other. Conflict occurs by chance, perhaps only once, and has no serious effect on the bullied child. In addition, the "perpetrator" often repents and takes responsibility, and does not aim to gain power.

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Another confusion can be created by the bullying or observation children themselves, who may claim that a bullying behavior is nothing more or less than "joke" or "teasing". However, one important difference is that fun happens between friends, while bullying does NOT. Also, on the plate there are alternations in the roles and a necessary condition is that everyone laughs. Finally, the plate does NOT include a child who is in pain, scared or ashamed, emotions caused by bullying behaviors.