Definition of ballast:
- Any heavy matter put into the car of a balloon to give it steadiness.
- Any heavy substance, as stone, iron, etc., put into the hold to sink a vessel in the water to such a depth as to prevent capsizing.
- Fig.: That which gives, or helps to maintain, uprightness, steadiness, and security.
- Gravel, broken stone, etc., laid in the bed of a railroad to make it firm and solid.
- The larger solids, as broken stone or gravel, used in making concrete.
- To fill in, as the bed of a railroad, with gravel, stone, etc., in order to make it firm and solid.
- To keep steady; to steady, morally.
- To steady, as a vessel, by putting heavy substances in the hold.
By shifting the ballast in each of the vessels entirely to one side, he caused them to lean in such a manner as that their artillery could be elevated to a surprising degree, and the shot rise even to the summit of the hill.- "The Campaigns of the British Army at Washington and New Orleans 1814-1815", G. R. Gleig.
- "Hills of the Shatemuc", Susan Warner.
- "Wild Flowers Worth Knowing", Neltje Blanchan et al.