Bullying is long-term, systematic and aggressive behaviour carried out with the aim or effect of hurting someone or gaining a sense of superiority or advantage. It is usually directed against an individual or a group who find it difficult to avoid or defend against such behaviour. Bullying may often be subtle, hardly recognisable at first sight, and in some cases it may not even be intentional.
Bullying can occur among students or among employees, by employees against students, or by students against employees.