1. a natural depression in the ground caused by the collapse of a surface layer
Usage: geology
2. something that uses up a large amount of money, time, or resources
Usage: figurative

Examples

• A massive sinkhole opened up in the middle of the street after heavy rains.
• The limestone bedrock made the area prone to sinkholes.
• Cars were swallowed by the sudden sinkhole that appeared overnight.
• The old project became a financial sinkhole for the company.
• This renovation is turning into a money sinkhole.
• The sinkhole was caused by underground water erosion.
• Emergency crews cordoned off the dangerous sinkhole.