Who is Lucifer?
The most common meaning for Lucifer in English is as a name for the Devil in Christian theology. It appeared in the King James Version of the Bible in Isaiah and before that in the Vulgate (the late-4th-century Latin translation of the Bible), not as the name of a devil but as the Latin word lucifer (uncapitalized), meaning "the morning star", "the planet Venus", or, as an adjective, "light-bringing". It is a translation of the Hebrew word הֵילֵל, hêlēl, meaning "Shining One". As the Latin name for the morning appearances of the planet Venus, it corresponds to the Greek names Phosphorus Φωσφόρος, "light-bringer", and Eosphorus Ἑωσφόρος, "dawn-bringer". The entity's Latin name was subsequently absorbed into Christianity as a name for the devil. Modern scholarship generally translates the term in the relevant Bible passage (Isaiah 14:12), where the Greek Septuagint reads ὁ ἑωσφόρος ὁ πρωὶ ἀνατέλλων, as "morning star" or "shining one"...