fall line
noun
Definition of fall line
1 : a line joining the waterfalls on numerous rivers that marks the point where each river descends from the upland to the lowland and the limit of the navigability of each river
2 : the natural downhill course (as for skiing) between two points on a slope
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1882
First Known Use of fall line
1882
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See words that rhyme with fall line Britannica.com: Encyclopedia article about fall line
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