* "Wingardium Leviosa": This spell, meaning "Wingardium leviosa," is used to levitate objects. It is first used in the Charms lesson with Professor Flitwick.
* "Lumos": This simple spell, meaning "light," is used to illuminate a wand tip with a light source. It's first used by Hermione Granger in the first chapter.
While these are the first spells introduced in the book, some others are used earlier on, but without names or explicit explanations. For example, Hagrid uses a spell to open the door to the Forbidden Forest in the first chapter, but the specific incantation is not revealed.
It's important to note that these spells are not necessarily the *first* spells learned by Harry, Ron, and Hermione. They may have been taught basic spells in their first few weeks at Hogwarts, which are not described in the book.