Holocaust survivors are people who survived the Holocaust, defined as the persecution and attempted annihilation of the Jews by Nazi Germany and its allies before and during World War II in Europe and North Africa. There is no universally accepted definition of the term, and it has been applied variously to Jews who survived the war in German-occupied Europe or other Axis territories, as well as to those who fled to Allied and neutral countries before or during the war. In some cases, non-Jews who also experienced collective persecution under the Nazi regime are considered Holocaust survivors as well. The definition has evolved over time.