sink
     n 1: plumbing fixture consisting of a water basin fixed to a wall
          or floor and having a drainpipe
     2: (technology) a process that acts to absorb or remove energy
        or a substance from a system; "the ocean is a sink for
        carbon dioxide" [ant: {source}]
     3: a depression in the ground communicating with a subterranean
        passage (especially in limestone) and formed by solution
        or by collapse of a cavern roof [syn: {sinkhole}, {swallow
        hole}]
     4: a covered cistern; waste water and sewage flow into it [syn:
         {cesspool}, {cesspit}, {sump}]
     v 1: fall or drop to a lower place or level; "He sank to his
          knees" [syn: {drop}, {drop down}]
     2: cause to sink; "The Japanese sank American ships in Pearl
        Harbor"
     3: pass into a specified state or condition; "He sank into
        Nirvana" [syn: {pass}, {lapse}]
     4: go under, "The raft sank and its occupants drowned" [syn: {settle},
         {go down}, {go under}] [ant: {float}]
     5: descend into or as if into some soft substance or place; "He
        sank into bed"; "She subsided into the chair" [syn: {subside}]
     6: appear to move downward; "The sun dipped below the horizon";
        "The setting sun sank below the tree line" [syn: {dip}]
     7: fall heavily or suddenly; decline markedly; "The real estate
        market fell off" [syn: {slump}, {fall off}]
     8: fall or sink heavily; "He slumped onto the couch"; "My
        spirits sank" [syn: {slump}, {slide down}]
     9: embed deeply; "She sank her fingers into the soft sand"; "He
        buried his head in her lap" [syn: {bury}]
     [also: {sunken}, {sunk}, {sank}]
Source: WordNet® 2.0