freeboard

  1. Noun.  (nautical) The vertical distance between the waterline and the uppermost watertight deck of a vessel.
  2. Noun.  The similar distance between a water level and the top of something that contains or restrains it (such as a dam).
  3. Noun.  The distance between the top of sea ice and the waterlevel.

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