Dutch door

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A Dutch door is a door divided horizontally in such a fashion that the bottom half may remain shut while the top half opens. The initial purpose of this door was to keep animals out of farmhouses, while allowing light and air to filter through the open top. Later modifications included doors where both halves can be closed or opened together. Mr. Ed's door from the show of the same name is an example.

The term is also applied to the modified rear doors on selected GMC Safaris and Chevrolet Astros that have a flip up rear window and two small half-size doors underneath.