irony

American Heritage® Dictionary of the English Language, Fourth Edition

1. n. The use of words to express something different from and often opposite to their literal meaning.
2. n. An expression or utterance marked by a deliberate contrast between apparent and intended meaning.
3. n. A literary style employing such contrasts for humorous or rhetorical effect. See Synonyms at wit¹.
4. n. 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).
5. n. An occurrence, result, or circumstance notable for such incongruity. See Usage Note at ironic.
6. n. Dramatic irony.
7. n. Socratic irony.

Century Dictionary and Cyclopedia

1. Consisting of or resembling iron; also, resembling any of the distinctive qualities of iron.
2. n. Simulated ignorance in discussion: a method of exposing an antagonist's ignorance by pretending to desire information or instruction from him. This method of discussion, the Socratic irony, was characteristic of Socrates, with reference to whom the term was first used.
3. n. Hence Covert sarcasm; such a use of agreeable or commendatory forms of expression as to convey a meaning opposite to that literally expressed; sarcastic laudation, compliment, or the like.

Wiktionary

1. n. A statement that, when taken in context, may actually mean something different from, or the opposite of what is written literally; the use of words expressing something other than their literal intention, notably as a form of humor.
2. n. Dramatic irony: a theatrical effect in which the meaning of a situation, or some incongruity in the plot, is understood by the audience, but not by the characters in the play.
3. n. Ignorance feigned for the purpose of confounding or provoking an antagonist; Socratic irony.
4. n. {{cite news
5. adj. Of or pertaining to the metal iron.

GNU Webster's 1913

1. adj. Made or consisting of iron; partaking of iron; iron; ; -- In this sense iron is the more common term.
2. adj. Resembling iron in taste, hardness, or other physical property.
3. n. Dissimulation; ignorance feigned for the purpose of confounding or provoking an antagonist.
4. n. A sort of humor, ridicule, or light sarcasm, which adopts a mode of speech the meaning of which is contrary to the literal sense of the words.

WordNet 3.0

1. n. a trope that involves incongruity between what is expected and what occurs
2. n. incongruity between what might be expected and what actually occurs
3. n. witty language used to convey insults or scorn