What is irony in the book of the lion the witch and the wardrobe?

An example of irony in "The Lion, the Witch, and the Wardrobe" is when the White Witch thinks she has triumphed by killing Aslan, only for him to rise again and defeat her, demonstrating that good ultimately prevails over evil. Another example is when Edmund's betrayal of his siblings results in him being saved by Aslan, showing the power of forgiveness and redemption.