(chiefly, pejorative) A person who lives at, lived at, or was raised by someone at a low altitude or from any city. A person not raised in or by someone directly from high mountain areas. (used by those who were born, raised, and are still living in higher altitude non-city or city like areas).
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(cycling) A flatland BMX rider.
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(physics) An inhabitant of or observer in a universe with two spatial dimensions.
To the flatlander the third dimension necessarily appears to be a process, something he travels through as he moves or is shifted across an area. He cannot occupy more than one position in the third dimension simultaneously.
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