noun
1.
a. : the space between the outer and inner bottom plating in a ship used to carry water ballast
b. : a similar space in a petroleum storage tank
2. : land underlying water
noun
1.
a. : the space between the outer and inner bottom plating in a ship used to carry water ballast
b. : a similar space in a petroleum storage tank
2. : land underlying water
Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012