Cosmic irony definition: (also known as “Irony of Fate”) this is the idea that some God or gods (like the Fates), or superior being is intentionally creating ironic situations in the lives and minds of humans.
Cosmic irony is a sub-type of Situational Irony, with the idea that some “being” is messing with humans, perhaps for its own amusement or to keep us amused or to teach us a lesson, or so the fantasy goes.
These types of ironies can arise from differences between what someone expects from a situation, and what actually happens, or dissonance between ideals and reality.
To define “cosmic irony,” you basically just take “situational irony” and add a “cosmic meddler.”