Definition of: sink

(singk) v. sank or sunk, sunk (Obs. sunk·en), sink·ing v.i.
1. To go beneath the surface or to the bottom, as of water or snow.
2. To descend to a lower level; go down, especially slowly or by degrees: The flames are sinking.
3. To descend toward or below the horizon, as the sun.
4. To incline downward; slope, as land.
5. To pass into a specified state: to sink into sleep or a coma.
6. To fail, as from ill-health or lack of strength; approach death: He's sinking fast.
7. To become less in force, volume, or degree: His voice sank to a whisper.
8. To become less in value, price, etc.
9. To decline in moral level, prestige, wealth, etc.: to sink into vice.
10. To penetrate a softer body: The oil sank into the wood.
11. To be impressed or fixed, as in the heart or mind: with in: I think that lesson will sink in.
—v.t.
12. To cause to go beneath the surface or to the bottom.
13. To cause to fall or drop; lower: He sank his head upon his breast.
14. To force or drive into place: to sink a fence post.
15. To make (a mine shaft, well, etc.) by digging or excavating.
16. To reduce in force, volume, or degree.
17. To debase or degrade, as one's character or honor.
18. To suppress or hide; also, to omit.
19. To defeat; ruin.
20. To invest.
21. To invest and subsequently lose: I sank a million in that deal.
—noun
1. A box-shaped, basinlike, porcelain or metal receptacle with a drainpipe and usually with a water supply; a cesspool or the like.
2. A place where corruption and vice gather or are rampant.
3. A natural pool, marsh, or basin in which a river terminates by evaporation or percolation. [OE sincan]
—sink′a·ble adjective