Lucifer is the bringer of light, the morning star.
In the Christian tradition, it is one of the devil's names.
The word Lucifer comes from the Latin lux, which means light, and screw, which is to carry, to carry. He is therefore the bearer of light, or even the morning star or son of the morning, as found in ancient records.
These expressions also represented the Venus planet, one of the brightest celestial bodies that keeps its light beside the moon until the first rays of morning.
In Hebrew, the name lucifer is translated to hellel.
There is a theological understanding that the term Lucifer as a proper name is a misnomer in one of the Bible translations over the millennia. The only verse that speaks of "Lucifer" is Isaiah 14:4, and that would actually correspond to King Nebuchadnezzar of Babylon, called the "morning star".
The fallen angel
Christian tradition knows the name Lucifer as the fallen angel who is also known as Satan. This conception was created by St. Jerome when translating the Vulgate, the Bible into Latin, in the 4th century AD. Ç.
Lucifer was an angel of the Order of Cherubim, described in the Bible as impressively beautiful and closely related to God, and he himself was created God. However, Lucifer wanted to be like God and was expelled from paradise.
The angel of light considered himself superior to man and the rest of creation, for having been created before and presenting characteristics that he thought were more important. His pride and insolence caused him to leave Heaven.
In the book of Revelation, the Bible talks about the battle between Archangel Michael and Lucifer. He will be defeated and as punishment God will send him to Hell, where Lucifer (also known as Satan) will be trapped forever.
The term Lucifer is then assigned only when the fall of the angel, which is his expulsion from Heaven, is mentioned.