An Encylopedia Britannica Company

ballast

1 ENTRIES FOUND:
ballast /ˈbæləst/ noun
ballast
/ˈbæləst/
noun
Britannica Dictionary definition of BALLAST
[noncount]
: heavy material (such as rocks or water) that is put on a ship to make it steady or on a balloon to control its height in the air often used figuratively