canon

Imagine a group of friends all obsessed with the same superhero universe. They debate endlessly about which comics are essential—the ones that truly define the character's story and powers. That essential collection? That's their canon.

The word "canon" originally referred to rules set by the church, but today it usually describes an accepted body of work—like Shakespeare's plays being considered a literary canon, or the official storyline in a fictional universe. Something is "in canon" if it's officially part of the established story; something that fans create themselves (fanfiction) is often not considered canon. You might say, "That movie doesn't fit with the established canon," meaning it contradicts what came before. You'll also hear it in broader cultural debates: people argue about which books, films, or artworks "belong" in the canon.

The word "canon" has a fascinating journey through history, starting as a set of rules or laws decreed by the church—think of it as an authoritative list of beliefs and practices. Over time, its meaning broadened to encompass any officially accepted collection of works or principles. Today, we most often encounter "canon" in discussions about stories, particularly fiction.

Think of a beloved series like Harry Potter or Star Wars. The original books or films form the core canon—the foundation upon which everything else is built. Any sequels, prequels, spin-offs, or expanded universe materials are then judged against this established canon. If something contradicts the original stories, fans might argue it's "not true to the canon."

But "canon" isn't limited to fictional universes. In religion, it can mean the official list of sacred writings accepted as scripture (the biblical canon), and "canon law" is the body of church law. In everyday academic and cultural talk, it often means a body of literature, art, or ideas considered particularly important and influential—like the Western canon of classic works by authors such as Homer, Shakespeare, and Austen. You can also use it more generally for accepted rules or principles in a field: "the canons of good writing" or "the canons of evidence."

There are a couple of less common (but still real) uses. A "canon" can be a clergy member attached to a cathedral or similar church institution (so you might read about "the canons of St. Paul's"). And in music, a canon is a contrapuntal composition where a melody is imitated by one or more voices after a delay (similar to a "round" like "Row, Row, Row Your Boat").

So, whether you're debating the latest Marvel movie, studying great literature, talking about rules in a discipline, or analyzing musical form, "canon" points to an established standard—what a community treats as authoritative, essential, and "official." (And if you ever mix it up with cannon, you're not alone: canon is about standards and accepted works; cannon is a big gun.)