The precise function of the school for the community in general and its children and youth in particular is difficult to determine and coherently articulate. Teachers and administrators often find it difficult to meet all the conflicting demands to which the school is exposed. Each school is different and has its own aura, determined by the various independent aspects, not least the origin and organizational setup of the institution. Unfortunately, in recent years school violence has become a serious topic of concern. There are numerous types of school violence including physical, mental or sexual abuse, thefts and vandalism. There are various kinds of school violence ranging from bullying, fighting, assaulting inside and outside the school premises, bringing drugs and harmful components to the school, sexual harassment, vandalism, robbing or stealing, bringing handheld weapons and firearms inside the school premises to many more of such kinds of behaviours that are not acceptable inside the school premises and also in the society. This chapter focuses on the meaning and definitions of bullying behaviour, a form of aggression shown by the students.