What irony is not
There's a linguistic reason why it's lost on many people. Irony is notoriously difficult to understand, and over time its meaning has shifted to cover a range of feelings. Psychology professor Roger Kreuz provides a handy guide to distinguishing the notoriously slippery concept from its distant cousins: coincidence, satire, parody, and paradox — hoping that we can find some clarity on the complicated term.
From MIT Press Reader