Definition of sinkhole
1
: a hollow place or depression in which drainage collects
2
: a hollow in a limestone region that communicates with a cavern or passage
3
: sink sense 2
4
: something (such as an unprofitable investment) that steadily drains money or resources
a financial sinkhole
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Merriam-Webster unabridged
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Time Traveler for sinkhole
The first known use of sinkhole was in the 15th century
See more words from the same century