Fading refers to the Elven practice of ritualistically entering a place of nature and dying. The term is most commonly used by and associated with Forest Elves, who believe that Celestidhl Faded from grief at the death of her husband. River Elves hold similar beliefs regarding the Ocean.
Whether Fading is meant to be literal or metaphorical is debated. Some believe that an Elf will literally fade out of existence and join the natural elements around them. Others believe it is a poetic way of referring to ritualistic suicide, or a sort of "last hunt."