Sinkhole
noun
1.
a hole formed in soluble rock by the action of water, serving to conduct surface water to an underground passage.
2.
Also called sink. a depressed area in which waste or drainage collects.
noun
1.
Also called (esp Brit) swallow hole. a depression in the ground surface, esp in limestone, where a surface stream disappears underground
2.
a place into which foul matter runs
sinkhole
(sĭngk’hōl’)
A natural depression in a land surface formed by the dissolution and collapse of a cavern roof. Sinkholes are roughly funnel-shaped and on the order of tens of meters in size. They generally occur in limestone regions and are connected to subteranean passages. Also called sink. See more at karst topography.
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verb (used without object), sank or, often sunk; sunk or sunken; sinking. 1. to displace part of the volume of a supporting substance or object and become totally or partially submerged or enveloped; fall or descend into or below the surface or to the bottom (often followed by in or into): The battleship sank within […]
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noun 1. a fund to extinguish an indebtedness, usually a bond issue. sinking fund noun 1. a fund accumulated out of a business enterprise’s earnings or a government’s revenue and invested to repay a long-term debt or meet a depreciation charge sinking fund definition A fund into which companies or governments place money to redeem […]
- Sinkless
adjective 1. unsinkable, as a ship.