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.
The quality or state of an event being both coincidental and contradictory in a humorous or poignant and extremely improbable way.
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.
Ignorance feigned for the purpose of confounding or provoking an antagonist; Socratic irony.