v.intr.1. To descend to the bottom; submerge.
2. a. To fall or drop to a lower level, especially to go down slowly or in stages: The water in the lake sank several feet during the long, dry summer.
b. To subside or settle gradually, as a massive or weighty structure.
3. To appear to move downward, as the sun or moon in setting.
4. To slope downward; incline.
5. To pass into a specified condition: She sank into a deep sleep.
6. a. To deteriorate in quality or condition: The patient is sinking fast. The family sank into a state of disgrace.
b. To diminish, as in value.
7. To become weaker, quieter, or less forceful: His voice sank to a whisper.
8. a. To drop or fall slowly, as from weakness or fatigue: The exhausted runner sank to the ground.
b. To feel great disappointment or discouragement: Her heart sank within her.
9. To seep or soak; penetrate: The water is sinking into the ground.
10. To make an impression; become felt or understood: The meaning finally sank in.
v.tr.1. To cause to descend beneath a surface: sink a ship.
2. To cause to drop or lower: sank the bucket into the well.
3. To force into the ground: sink a piling.
4. To dig or drill (a mine or well) in the earth.
5. To occupy the full attention of; engross.
6. a. To make weaker, quieter, or less forceful.
b. To reduce in quantity or worth.
7. To debase the nature of; degrade.
8. To bring to a low or ruined state; defeat or destroy.
9. To suppress or hide: He sank his arrogance and apologized.
10. Informal To defeat, as in a game.
11. a. To invest: sink money into a new housing project.
b. To invest without any prospect of return.
12. To pay off (a debt).
13. Sports To get (a ball) into a hole or basket.
n.1. A water basin fixed to a wall or floor and having a drainpipe and generally a piped supply of water.
2. A cesspool.
3. A sinkhole.
4. A natural or artificial means of absorbing or removing a substance or a form of energy from a system.
5. A place regarded as wicked and corrupt.