Overworld

Name
The "Overworld" is a name for the world above, in Minecraftia. It is called this because The Nether, also known as The Flame Kingdom, is most likely underground, due to the bedrock ceiling, extreme heat, and lava lakes, and The End (the true Underworld) is in deep space, and it is so small that it's gravity pulls most things down and doesn't allow anything else into the atmosphere, makes it above most things. So there. End of story.