There's a lot of lingo around the wider web (which is itself lingo) so this is one of a series of short definition posts.

Flat display: A display that does not change its view as your position changes.

This is the display mode of the current web, like you'd see on any old desktop, laptop, tablet, or mobile phone running a web browser. You load the page and it just sits there, no matter how you wave it around or move your head.

I mean, really.

Flat display is one of the three display modes on the wider web:

Wider web display modes

The other two display modes are portal and immersive.