Webster dictionary was developed by Noah Webster in the beginning of 19th century. On this website, you can find definition for ballast from the 1913 edition of Webster's Revised Unabridged Dictionary. Define ballast using one of the most comprehensive free online dictionaries on the web.

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Part of Speech: Noun
Results: 8
1. 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.
2. Any heavy matter put into the car of a balloon to give it steadiness.
3. Gravel, broken stone, etc., laid in the bed of a railroad to make it firm and solid.
4. The larger solids, as broken stone or gravel, used in making concrete.
5. Fig.: That which gives, or helps to maintain, uprightness, steadiness, and security.
Part of Speech: verb transitive
1. To steady, as a vessel, by putting heavy substances in the hold.
3. To keep steady; to steady, morally.
Examples of usage:
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