1. to go down below the surface of water or another liquid
2. to move downward or fall to a lower level
3. to become less in amount, value, or strength

1. a basin with faucets and a drain, used for washing

Examples

• The ship began to sink after hitting the iceberg.
• The sun will sink below the horizon at sunset.
• Stock prices continued to sink throughout the day.
• Please wash the dishes in the kitchen sink.
• The workers will sink a well to find water.
• Her heart sank when she heard the bad news.
• The heavy stone sank to the bottom of the pond.