Verbal irony is a statement in which the meaning that a speaker employs
is sharply different from the meaning that is ostensibly expressed. The
ironic statement usually involves the explicit expression of one
attitude or evaluation, but with indications in the overall
speech-situation that the speaker intends a very different, and often
opposite, attitude or evaluation
Dramatic Irony is the device of giving the spectator an item of
information that at least one of the characters in the narrative is
unaware of (at least consciously), thus placing the spectator a step
ahead of at least one of the characters