Definition: Supercanonical is a term that blends together the concepts of "super" and "canonical." It's used to describe something that isn’t necessarily on the list of things you would expect to find at the top of the stack in a library, but is considered to be significant or unique.

Here’s an example sentence using 'supercanonical': "I've just checked out this obscure book that claims to be supercanonical and I can't even remember reading it." In this scenario, "supercanonical" refers to something so peculiar or off the beaten path that it's considered as if it was only known due to its unique qualities. The author of the book is likely an outsider who stumbled across this piece of knowledge without knowing about it beforehand. It's a bit unsettling because it suggests there might be secrets and anomalies in the world beyond what we've come to expect.