The Holocaust (from the Greek ὁλόκαυστος holókaustos: hólos, "whole" and kaustós, "burnt"), also known as the Shoah (Hebrew: השואה, HaShoah, "the catastrophe"), was a genocide in which approximately six million Jews were killed by the Nazi regime and its collaborators. Some historians use a definition of the Holocaust that includes the additional five million non-Jewish victims of Nazi mass murders, bringing the total to approximately eleven million.