Humorously sarcastic or mocking "an ironic remark often conveys an intended meaning obliquely"; "an ironic novel" - dry, ironical, wry
Characterized by often poignant difference or incongruity between what is expected and what actually is "madness, an ironic fate for such a clear thinker" - ironical
See also: humorous, humourous [Brit, Cdn, non-standard], incongruous, irony