Airplane Tray Table

Photo above shows a tray. On airplanes, it's commonly mis-referred to as a "tray table."

A tray is a shallow platform designed for carrying things.

A table is a form of furniture. Alternately, a table is an organized set of data elements using a model of vertical columns and horizontal rows.

So it makes no sense when the flight attendant tells everyone to put their "tray table in the full upright and locked position."

To move it to "upright" would mean that it was "sideways" when it was "horizontal."

And it never gets "locked," it gets "latched."

Don't get me started ...