Muslim
A Muslim (Arabic: مُسلِم) is someone who follows or practices Islam, a monotheistic Abrahamic religion. Muslims consider the Quran, their holy book, to be the verbatim word of God as revealed to the Islamic prophet and messenger Muhammad. The majority of Muslims also follow the teachings and practices of Muhammad (sunnah) as recorded in traditional accounts (hadith). "Muslim" is an Arabic word meaning "submitter" (to God).
World
The world is the planet Earth and all life upon it, including human civilization. In a philosophical context, the "world" is the whole of the physical Universe, or an ontological world (the "world" of an individual). In a theological context, the world is the material or the profane sphere, as opposed to the celestial, spiritual, transcendent or sacred spheres. "End of the world" scenarios refer to the end of human history, often in religious contexts.