Internally Displaced Person: An internally displaced person (IDP) is someone who has been forced to leave their home for reasons such as religious or political persecution, war or natural disaster, but has not crossed an international border. The term is a subset of the more general displaced person. There is no legal definition of IDP, as there is for refugee [1], but the rule of thumb is that if the person in question would be eligible for refugee status if he or she crossed an international border then the IDP label is applicable. IDPs are not technically refugees because they have not crossed an international border, but are sometimes casually referred to as refugees