Glaringly means in a way that's impossible to miss or ignore, usually because something is so obvious, bright, or wrong that it practically jumps out at you.

When a mistake is glaringly obvious, anyone who looks can see it immediately. If you write “2 + 2 = 5” on the board, that error is glaringly wrong. When something stands out glaringly, it's like a neon sign in a dark room: you can't help but notice it.

The word often describes problems or differences that should have been caught but weren't. A glaring error in a published book is one that's so clear you wonder how the editor missed it. A glaring contradiction means two statements that obviously clash with each other.

Just as bright light demands your attention, something glaringly obvious demands to be noticed. When a rule applies glaringly to a situation, everyone can see it fits perfectly.