Faerûn is a major continent on the planet of Toril. The word “Faerûn” is a modified version of “Faerie”, the name of the homeland of ancient elves. The term was coined by Durothil, prince of Tintageer, Faerie.

“Someone should have dared, long ago, and done so as often as it took to break you of this serenely wrong view of the ways of the world. Hear this, Narantha, and hear it well: Faerûn is not going to change to your will. Either you must change to dwell in it, or it will break you.”
— Florin Falconhand of the Knights of Myth Drannor