A low, level area with very little hills or changes in elevation; any completely flat geographic region.
From 'flat' + 'land', a straightforward compound word. Common in American geography to describe plains regions like the Great Plains or Midwest.
Edwin Abbott's 1884 novella 'Flatland' used a completely flat, 2-dimensional world as a clever satire of Victorian society—the mathematical idea of dimensionality became a way to poke fun at social hierarchies!
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