The term supernatural or supranatural (Latin: super, supra "above" + natura "nature") pertains to an imagined order of existence beyond the scientifically visible universe. Religious miracles are typically supernatural claims, as are spells and curses, divination, the belief that there is an afterlife for the dead, and innumerable others. Supernatural beliefs have existed in many cultures throughout human history.

Characteristic for phenomena claimed as supernatural are anomaly, uniqueness and uncontrollability, thus lacking reproducibility required for scientific examination. Supernatural themes are often associated with paranormal and occult ideas, suggesting for possibility of interaction with the supernatural by means of summoning or trance for instance.

Lucifer is a name frequently given to Satan in Christian belief. This usage as a reference to a fallen angel stems from a particular interpretation of a passage in the Bible (Isaiah 14:3-20) that speaks of someone who is given the name of "Day Star" or "Morning Star" (in Latin, Lucifer) as fallen from heaven. The same Latin word is used of the morning star in 2 Peter 1:19 and elsewhere with no relation to Satan. However, in many writings later than those of the Bible the Latin word has been used, without being translated as "Morning Star" and the like, as a proper name with which to designate Satan.

In Latin, the word "Lucifer", meaning "Light-Bringer" (from lux, lucis, "light", and ferre, "to bear, bring"), is a name for the "Morning Star" (the planet Venus in its dawn appearances). The Latin Vulgate version of the Bible used this word twice to refer to the Morning Star: once in 2 Peter 1:19 to translate the Greek word "Φωσφόρος" (Phosphoros), which has exactly the same literal meaning of "Light-Bringer" that "Lucifer" has in Latin; and once in Isaiah 14:12 to translate "הילל" (Hêlēl), which also means "Morning Star". In the latter passage the title of "Morning Star" is given to the tyrannous Babylonian king, who the prophet says is destined to fall. This passage was later applied to the prince of the demons, and so the name "Lucifer" came to be used for Satan, and was popularized in works such as Dante Alighieri's Inferno and John Milton's Paradise Lost, but for English speakers the greatest influence has been its use in the King James Version (more modern English versions translate the term as "Morning Star" or "Day Star").

God is a deity in theistic and deistic religions and other belief systems, representing either the sole deity in monotheism, or a principal deity in polytheism.

God is most often conceived of as the supernatural creator and overseer of the universe. Theologians have ascribed a variety of attributes to the many different conceptions of God. The most common among these include omniscience, omnipotence, omnipresence, omnibenevolence (perfect goodness), divine simplicity, and eternal and necessary existence. God has also been conceived as being incorporeal, a personal being, the source of all moral obligation, and the "greatest conceivable existent". These attributes were all supported to varying degrees by the early Jewish, Christian and Muslim theologian philosophers, including Maimonides, Augustine of Hippo, and Al-Ghazali, respectively. Many notable medieval philosophers developed arguments for the existence of God, attempting to wrestle with the apparent contradictions implied by many of these attributes.