\Sink\ (s[i^][ng]k), n.
The lowest part of a natural hollow or closed basin whence
the water of one or more streams escapes by evaporation; as,
the sink of the Humboldt River. [Western U. S.]

\Sink\, v. i. [imp. {Sunk}, or ({Sank}); p. p. {Sunk} (obs.
{Sunken}, -- now used as adj.); p. pr. & vb. n. {Sinking}.]
[OE. sinken, AS. sincan; akin to D. zinken, OS. sincan, G.
sinken, Icel. s["o]kkva, Dan. synke, Sw. sjunka, Goth.
siggan, and probably to E. silt. Cf. {Silt}.]
1. To fall by, or as by, the force of gravity; to descend
   lower and lower; to decline gradually; to subside; as, a
   stone sinks in water; waves rise and sink; the sun sinks
   in the west.
         I sink in deep mire.                  --Ps. lxix. 2.
2. To enter deeply; to fall or retire beneath or below the
   surface; to penetrate.
         The stone sunk into his forehead.     --1 San. xvii.
                                               49.
3. Hence, to enter so as to make an abiding impression; to
   enter completely.
         Let these sayings sink down into your ears. --Luke
                                               ix. 44.
4. To be overwhelmed or depressed; to fall slowly, as so the
   ground, from weakness or from an overburden; to fail in
   strength; to decline; to decay; to decrease.
         I think our country sinks beneath the yoke. --Shak.
         He sunk down in his chariot.          --2 Kings ix.
                                               24.
         Let not the fire sink or slacken.     --Mortimer.
5. To decrease in volume, as a river; to subside; to become
   diminished in volume or in apparent height.
         The Alps and Pyreneans sink before him. --Addison.
Syn: To fall; subside; drop; droop; lower; decline; decay;
     decrease; lessen.

\Sink\, v. t.
1. To cause to sink; to put under water; to immerse or
   submerge in a fluid; as, to sink a ship.
         [The Athenians] fell upon the wings and sank a
         single ship.                          --Jowett
                                               (Thucyd.).
2. Figuratively: To cause to decline; to depress; to degrade;
   hence, to ruin irretrievably; to destroy, as by drowping;
   as, to sink one's reputation.
         I raise of sink, imprison or set free. --Prior.
         If I have a conscience, let it sink me. --Shak.
         Thy cruel and unnatural lust of power Has sunk thy
         father more than all his years.       --Rowe.
3. To make (a depression) by digging, delving, or cutting,
   etc.; as, to sink a pit or a well; to sink a die.
4. To bring low; to reduce in quantity; to waste.
         You sunk the river repeated draughts. --Addison.
5. To conseal and appropriate. [Slang]
         If sent with ready money to buy anything, and you
         happen to be out of pocket, sink the money, and take
         up the goods on account.              --Swift.
6. To keep out of sight; to suppress; to ignore.
         A courtly willingness to sink obnoxious truths.
                                               --Robertson.
7. To reduce or extinguish by payment; as, to sink the
   national debt.

\Sink\, n.
1. A drain to carry off filthy water; a jakes.
2. A shallow box or vessel of wood, stone, iron, or other
   material, connected with a drain, and used for receiving
   filthy water, etc., as in a kitchen.
3. A hole or low place in land or rock, where waters sink and
   are lost; -- called also {sink hole}. [U. S.]
{Sink hole}.
   (a) The opening to a sink drain.
   (b) A cesspool.
   (c) Same as {Sink}, n., 3.