1.Definition: characterized by often poignant difference or incongruity between what is expected and what actually is

"Madness, an ironic fate for such a clear thinker", "It was ironical that the well-planned scheme failed so completely"

Related Adjective(s):ironical

2.Definition: humorously sarcastic or mocking

"An ironic remark often conveys an intended meaning obliquely", "An ironic novel", "An ironical smile"

Related Adjective(s):dry, ironical, wry