ballast
Defined in 5 dictionaries — U.S. Code, Cyclopedic (1922), Bouvier (1914), Black's (1910), Black's (1891)
United States Code
42 U.S.C. § 6291 — for purposes of this part (6 versions over time)
The term “ballast” means a device used with an electric discharge lamp to obtain necessary circuit conditions (voltage, current, and waveform) for starting and operating.
The Cyclopedic Law Dictionary
Walter A. Shumaker and George Foster Longsdorf; ed. James C. Cahill · 1922
Heavy substance carried in the hold of a ship to trim her, and bring her to a safe and proper draft. It differs from "dunnage" {q. v.) 13 Wall. (U. S.) 674. Rock, gravel or other material placed on the roadbed of a railway to support and retain the ties and track.
Bouvier's Law Dictionary and Concise Encyclopedia
John Bouvier; revised by Francis Rawle · 1914
That which is used for trimming a ship to bring it down to a draft of water proper and safe for sailing. Great Western Ins. Co. v. Thwing, 13 WalL (U. S.) 674, 20 L. Ed. 607.
Black's Law Dictionary
Henry Campbell Black, M.A. · 1910
A Dictionary of Law
Henry Campbell Black · 1891
In marineinsurance, There is considerable analogy between ballast and dunnage. ‘The former is used for trimming the ship, and bringing it down to a draft of water proper and sate for sailing. Dunnage is placed under the cargo to keep it from be ing wetted by water getting into the hold, or between the different parcels to keep them from bruising and injuring each other. 13 Wall. 674.