Meaning offreeboardin English

Noun

1. vertical distance between waterline and deck (on a vessel)
   The ship's freeboard was measured to ensure stability.
2. distance between water level and a containing structure's top
   The reservoir's freeboard is the gap between the water surface and the dam's crest.
3. distance between sea ice and water level
   The scientist studied the freeboard of the sea ice to understand its thickness.