Definition of

Sink

  1. (noun, artifact) a covered cistern; waste water and sewage flow into it
  2. (noun, artifact) plumbing fixture consisting of a water basin fixed to a wall or floor and having a drainpipe
  3. (noun, object) 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. (noun, process) (technology) a process that acts to absorb or remove energy or a substance from a system
  5. (verb, change) fall heavily or suddenly; decline markedly
  6. (verb, contact) embed deeply
    He buried his head in her lap
  7. (verb, motion) descend into or as if into some soft substance or place
    She subsided into the chair
  8. (verb, motion) pass into a specified state or condition
  9. (verb, motion) fall or descend to a lower place or level
  10. (verb, motion) cause to sink
  11. (verb, motion) fall or sink heavily
    My spirits sank
  12. (verb, motion) go under,
  13. (verb, motion) appear to move downward
    The setting sun sank below the tree line

via WordNet, Princeton University

Antonyms of Sink

float, source

Origin of the word Sink

  1. O.E. sincan "become submerged, go under" (past tense sanc, pp. suncen), from P.Gmc. *senkwanan (cf. O.S. sinkan, O.N. s?kkva, M.Du. sinken, Du. zinken, O.H.G. sinkan, Ger. sinken, Goth. sigqan), from PIE base *sengw- "to sink." The transitive use supplants M.E. sench (cf. drink/drench<… more
  2. 1413, "pool or pit for wastewater or sewage," from sink (v.). Sense of "shallow basin with drainpipe" first recorded 1566. more

via Online Etymology Dictionary, ©2001 Douglas Harper

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