The jinn (also spelled djinn), or genies, are supernatural spirits mentioned in the Quran and Islamic mythology who inhabit an unseen world in dimensions beyond the visible universe of humans. Together, the jinn, humans and angels make up the three sentient creations of God. The Quran mentions that the jinn are made of a smokeless and 'scorching fire', and they have the physical property of weight. Like human beings, the jinn can also be good, evil, or neutrally benevolent. The jinn are mentioned frequently in the Quran. Jinn is a noun of the collective number in Arabic literally meaning 'hidden from sight'.