It is IRONIC that the 1995 Alanis Morrisette song of the same name contains no irony. Or is that the point?
2) Describes the act of doing something with self-conscious humor or for kitsch value. This is a recent meaning, and usually refers to an article of clothing worn by a hipster. ex: "Does he actually work at a carwash, or is he just wearing that shirt to be ironic?"
3) adj. (antiquated) The opposite of the expected or intended result. This once-popular meaning was originally the only correct usage of the word, but it has now fallen into disfavor. It is still used occasionally, but is considered outdated and pedantic. ex: "I find it ironic that a song about irony should contain so few examples of it."