The world reached through the wardrobe in C.S. Lewis’s Narnia stories is Narnia.
In The Lion, the Witch and the Wardrobe, Lucy Pevensie discovers that the back of a wardrobe leads to a snowy forest in Narnia. The name applies both to the fictional world and, more specifically, to the kingdom at its center in Lewis’s larger mythology.
Narnia contains talking animals, magical beings, and human visitors from our world. Aslan is its principal creator and ruler, while the stories also include neighboring lands such as Archenland and Calormen. These places are part of the wider setting, but they are not the wardrobe’s destination.
The word “Narnia” is therefore not the name of the wardrobe, the forest, or a single book. It identifies the realm explored across the seven novels, which were published between 1950 and 1956.