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Definition ballast

Etymology

From Middle English bar (�bare�) + last (�load�).

Noun

ballast (usually uncountable, plural ballasts)

1. (nautical) Heavy material that is placed in the hold of a ship (or in the gondola of a balloon), to provide stability.
2. (figuratively) Anything that steadies emotion or the mind.
3. Coarse gravel or similar material laid to form a bed for roads or railroads, or in making concrete.
4. (construction) A material, such as aggregate or precast concrete pavers, which employs its mass and the force of gravity to hold single-ply roof membranes in place.
5. (countable, electricity, electronics) device used for stabilizing current in an electric circuit (e.g. in a tube lamp supply circuit)
6. (figuratively) That which gives, or helps to maintain, uprightness, steadiness, and security.

Verb

ballast (third-person singular simple present ballasts, present participle ballasting, simple past and past participle ballasted)

1. To stabilize or load a ship with ballast.
2. To lay ballast on the bed of a railroad track.

Results 197 Words with the letters BALLAST

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