Main Entry:

sink·hole

Pronunciation:

\ˈsiŋk-ˌhōl\

Function:

noun

Date:

15th century

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 2 4 : something (as an unprofitable investment) that steadily drains money or resources <a financial sinkhole>