The Different Types of Irony

Verbal irony ... is a statement in which the meaning that a speaker implies differs sharply from the meaning that is ostensibly expressed. The ironic statement usually involves the explicit expression of one attitude or evaluation, but with indications in the overall speech-situation that the speaker intends a very different, and often opposite, attitude or evaluation
Dramatic irony involves a situation in a play or narrative in which the audience or reader shares with the author knowledge of present or future circumstances of which a character is ignorant; in that situation, the character unknowingly acts in a way we recognize to be grossly inappropriate to the actual circumstances, or expects the opposite of what we know that fate holds in store, or says something that anticipates the actual outcome, but not at all in the way that the character intends.
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