Definition of Irony

Noun: irony I-ru-nee

Witty language used to convey insults or scorn, esp. saying one thing but implying the opposite
"irony is wasted on the stupid";
- sarcasm, satire, caustic remark
Incongruity between what might be expected and what actually occurs
"the irony of Ireland's copying the nation she most hated"
A trope that involves incongruity between what is expected and what occurs