(1)   A covered cistern; waste water and sewage flow into it
(2)   Plumbing fixture consisting of a water basin fixed to a wall or floor and having a drainpipe
(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
(4)   (technology) a process that acts to absorb or remove energy or a substance from a system
"The ocean is a sink for carbon dioxide"


(5)   Fall heavily or suddenly; decline markedly
"The real estate market fell off"
(6)   Embed deeply
"She sank her fingers into the soft sand"
"He buried his head in her lap"
(7)   Descend into or as if into some soft substance or place
"He sank into bed"
"She subsided into the chair"
(8)   Pass into a specified state or condition
"He sank into Nirvana"
(9)   Fall or drop to a lower place or level
"He sank to his knees"
(10)   Cause to sink
"The Japanese sank American ships in Pearl Harbor"
(11)   Fall or sink heavily
"He slumped onto the couch"
"My spirits sank"
(12)   Go under, "The raft sank and its occupants drowned"
(13)   Appear to move downward
"The sun dipped below the horizon"
"The setting sun sank below the tree line"


  1. To descend into a liquid or other substance or material.
  2. To submerge (something) in a liquid or other substance or material.
  3. To cause (a ship, etc) to sink.
  4. To push (something) into something.
    • The dog sank its teeth into the delivery man's leg.
    • The joint will hold tighter if you sink a wood screw through both boards.
  5. Describing metaphorically the experience of apprehension, disappointment, or momentary depression as felt via an internal human organ.
    1915 Burgess, Thronton W., The Adventures of Chatterer the Red Squirrel, Little, Brown, and Company, Boston; ch. XIX:
    • Peter's heart sank. "Don't you think it is dreadful?" he asked.


  1. A basin used for holding water for washing.
  2. A sinkhole
  3. A depression in land where water collects, with no visible outlet.
  4. A heat sink.
  5. A place that absorbs resources or energy.
  6. The motion of a sinker pitch.
    Jones' has a two-seamer with heavy sink.
  7. An object or callback that captures events; event sink.