What is a region that consists of Algeria, Morocco, Tunisia, Libya and Mauritania called?

The Maghreb (Arabic: "the west"), also known as Northwest Africa, Greater Arab Maghreb, is a region of North Africa that is effectively a western part of the Arab world and is predominately Muslim. The region consists primarily of the countries Algeria, Morocco, Tunisia, Libya and Mauritania. It additionally includes the disputed territories of Western Sahara (controlled mostly by Morocco and partly by the self-proclaimed Sahrawi Arab Democratic Republic) and the cities of Melilla and Ceuta (both are controlled by Spain but claimed by Morocco). As of 2018, the region had a population of over 100 million people.

Through the eighteenth and nineteenth centuries, English and European sources often referred to the region as the Barbary Coast or the Barbary States, a term derived from the native Berber people. Sometimes the region was referred to as the Land of the Atlas, derived from the Atlas Mountains. In current Berber language media and literature, the region is part of what is known as Tamazgha.

The region is usually defined as much or most of northern Africa, including a large portion of Africa's Sahara Desert, and excluding Egypt, which is part of Mashriq. The traditional definition of the region, which restricted it to the Atlas Mountains and the coastal plains of Morocco, Algeria, Tunisia, and Libya, was expanded by the inclusion of Mauritania and of the disputed territory of Western Sahara.