- "'Deletrius!' Mr. Diggory shouted, and the smoky skull vanished in a wisp of smoke."
On the 25 August, 1994 after the Quidditch World Cup, during the Reappearance of the Dark Mark Amos Diggory used this spell to erase the ghost image of the Dark Mark he had caused to be emitted from Harry Potter's wand.
Latin verb delere meaning to destroy, from which the English word "delete" is derived, meaning to remove.
- Harry Potter and the Goblet of Fire (First appearance)