Irony is a figure of speech in which words are used in such a way that their intended meaning is different from the actual meaning of the words. It may also be a situation that may end up in quite a different way than what is generally anticipated. In simple words, it is a difference between the appearance and the reality.
Verbal irony (sarcasm) involves what one does not mean. When in response to a foolish idea, we say, “what a great idea!” it is a verbal irony.
Situational irony occurs when, for instance, a man is chuckling at the misfortune of the other even when the same misfortune, in complete unawareness, is befalling him.
Dramatic irony is a kind of irony in a situation, which the writers frequently employ in their works. In situational irony, both the characters and the audience are fully unaware of the implications of the real situation. In dramatic irony, the characters are oblivious of the situation but the audience is not. For example, in “Romeo and Juliet”, we know much before the characters that they are going to die. In real life circumstances, irony may be comical, bitter or sometimes unbearably offensive.
A Few Examples: