Search Result for "tonnage": 
Wordnet 3.0

NOUN (1)

1. a tax imposed on ships that enter the US; based on the tonnage of the ship;
[syn: tonnage, tunnage, tonnage duty]

The Collaborative International Dictionary of English v.0.48:

Tonnage \Ton"nage\ (?; 48), n. [From Ton a measure.] [1913 Webster] 1. The weight of goods carried in a boat or a ship. [1913 Webster] 2. The cubical content or burden of a vessel, or vessels, in tons; or, the amount of weight which one or several vessels may carry. See Ton, n. (b) . [1913 Webster] A fleet . . . with an aggregate tonnage of 60,000 seemed sufficient to conquer the world. --Motley. [1913 Webster] 3. A duty or impost on vessels, estimated per ton, or, a duty, toll, or rate payable on goods per ton transported on canals. [1913 Webster] 4. The whole amount of shipping estimated by tons; as, the tonnage of the United States. See Ton. [1913 Webster] Note: There are in common use the following terms relating to tonnage: (a) Displacement. (b) Register tonnage, gross and net. (c) Freight tonnage. (d) Builders' measurement. (e) Yacht measurement. The first is mainly used for war vessels, where the total weight is likely to be nearly constant. The second is the most important, being that used for commercial purposes. The third and fourth are different rules for ascertaining the actual burden-carrying power of a vessel, and the fifth is for the proper classification of pleasure craft. Gross tonnage expresses the total cubical interior of a vessel; net tonnage, the cubical space actually available for freight-carrying purposes. Rules for ascertaining these measurements are established by law. [1913 Webster]
WordNet (r) 3.0 (2006):

tonnage n 1: a tax imposed on ships that enter the US; based on the tonnage of the ship [syn: tonnage, tunnage, tonnage duty]
Moby Thesaurus II by Grady Ward, 1.0:

53 Moby Thesaurus words for "tonnage": accommodation, argosy, avoirdupois, beef, beefiness, bottoms, burden, capacity, carriage, cartage, content, cordage, deadweight, drayage, expressage, fatness, fleet, flotilla, freight, freightage, gravity, gross weight, haulage, heaviness, heft, heftiness, limit, line, liveweight, measure, merchant fleet, merchant navy, navy, neat weight, net, net weight, overbalance, overweight, ponderability, ponderosity, ponderousness, poundage, quantity, room, shipping, ships, space, stowage, underweight, volume, weight, weightiness, whaling fleet
Bouvier's Law Dictionary, Revised 6th Ed (1856):

TONNAGE, mar. law. The capacity of a ship or vessel. 2. The act of congress of March 2, 1799, s. 64, 1 Story's L. U. S. 630, directs that to ascertain the tonnage of any ship or vessel, the surveyor, &c. shall, if the said ship or vessel be double decked, take the length thereof from the forepart of the main stem, to the afterpart of the stern post, above the upper deck, the breadth thereof, at the broadest part above the mainwales, half of which breadth shall be accounted the depth of such vessel, and then deduct from the length three-fifths of the breadth, multiply the remainder by the breadth and the product of the depth, and shall divide this last product by ninety-five, the quotients whereof shall be deemed the true contents or tonnage of such ship or vessel. And if such ship or vessel shall be single decked, the said, surveyor shall take the length and breadth as above directed, in respect to a double deck ship or vessel, and shall deduct from the length three-fifths of the breadth, and taking the depth from the underside of the deck plank to the ceiling of the hold, shall multiply and divide as aforesaid, and the quotient shall be deemed the tonnage of such ship or vessel. 3. The duties paid on the tonnage of a ship or vessel are also called tonnage. 4. These duties are altogether abolished in relation. to American vessels by the act of May 31, 1830, s. 1, 4 Story's Laws U. S. 2216. And by the second section of the same act, all tonnage duties on foreign vessels are abolished, provided the president of the, United States shall be satisfied that the discriminating or countervailing duties of such foreign nation, so far as they operate to the disadvantage. of the United States, have been abolished. 5. The constitution of the United States provides, art. 1, s. 10, n. 2, that no state shall, without the consent of congress, lay any duty on tonnage.