sinkhole

  1. Noun.  (context, geology) A hole formed in soluble rock by the action of water, serving to conduct surface water to an underground passage.
  2. Noun.  A depressed area in which waste or drainage collects.
  3. Noun.  (context, pinball) A hole in the playfield that rewards the player when the ball is guided into it.

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This entry was last updated on RefTopia from its source on 3/20/2012.