What does Annatar mean?

Annatar meaning in Urban Dictionary

Of relating to the character, Sauron, from the works of J.R.R. Tolkien in Lord of the Rings and various, corresponding stories. Used to describe Sauron (the Dark Lord), in his original, pure form before he fell to evil, when he was a Maiar, like Gandalf. Also his disguise used to deceive the Elves of Eregon to forge his Ring of Power.