Definition of A bully
According to merriam-webster.com, a bully is "a blustering, browbeating person; especially : one who is habitually cruel, insulting, or threatening to others who are weaker, smaller, or in some way vulnerable tormented by the neighborhood bully".
Definition of cyber bullying
According to merriam-webster.com, cyber bullying is defined as " the electronic posting of mean-spirited messages about a person (as a student) often done anonymously".
Definition of relational bullying
When a student disrupts another student's peer relationships by gossiping, giving the silent treatment and spreading rumors.