Meaning of irony

(noun) witty language used to convey insults or scorn; "he used sarcasm to upset his opponent"; "irony is wasted on the stupid"; "Satire is a sort of glass, wherein beholders do generally discover everybody's face but their own"--Jonathan Swift

incongruity between what might be expected and what actually occurs; "the irony of Ireland's copying the nation she most hated"

a trope that involves incongruity between what is expected and what occurs