The use of words to express something different from and often opposite to their literal meaning.
An expression or utterance marked by a deliberate contrast between apparent and intended meaning.
A literary style employing such contrasts for humorous or rhetorical effect. See Synonyms at wit1.
Incongruity between what might be expected and what actually occurs: "Hyde noted the irony of Ireland's copying the nation she most hated” ( Richard Kain).
An occurrence, result, or circumstance notable for such incongruity. See Usage Note at ironic.