Glaurung is a fictional character from J.R.R. Tolkien's legendarium, specifically featured in "The Silmarillion." He is known as the first dragon created by Morgoth, the dark lord. Glaurung is characterized by his immense size, cunning intelligence, and ability to speak, making him a formidable foe in the tales of Middle-earth. Glaurung plays a significant role in the story of Turin Turambar, a tragic hero. He manipulates and curses Turin and his family, leading to devastating consequences. Glaurung's presence highlights themes of fate, pride, and the struggle against evil in Tolkien's works.