1.to disappear below the surface of the water; to make something, especially a boat, disappear below the surface of the water; to go below the surface of a soft substance
2.when the sun sinks, it gets lower in the sky until it disappears
3.to move to a lower level
4.to fall, sit, or lie down
5.to go down in value or amount
6.to invest money in something because you hope you will make more money
7.to push something sharp into something solid
8.in games such as golf or pool, to put a ball into a hole
9.to do something wrong
10.to become worse; if your spirits sink, you become sad; if your heart sinks, you lose hope
11.to become quiet
1.a large open container for water, usually attached to a wall and connected to pipes that bring the water and carry it away