A lake is a standing body of water greater than 1 hectare (about 2.5 acre) that has at least 1000 m2 (about 0.25 acre) of open water and is at least 1 meter (about 3 feet) deep at its deepest point. (See related: surface waters, wetlands.)
Other /More definition:
A lake is a body of fresh or salt water of considerable size, whose open-water and deep-bottom zones (no light penetration to bottom) are large compared to the shallow-water (shoreline) zone, which has light penetration to its bottom.

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"lake" is in the NAICS Code "212391"
 Potash, Soda, and Borate Mineral Mining
 ... natural potassium, sodium, or boron compounds. Drylake brine operations are included in this industry ...

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