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Tonnage

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ton⋅nage

[tuhn-ij]
–noun
1. the capacity of a merchant vessel, expressed either in units of weight, as deadweight tons, or of volume, as gross tons.
2. ships collectively considered with reference to their carrying capacity or together with their cargoes.
3. a duty on ships or boats at so much per ton of cargo or freight, or according to the capacity in tons.
Also, tunnage.


Origin:
1375–1425; late ME: duty < OF. See ton 1 , -age
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2009.
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ton·nage   (tŭn'ĭj)   
n.  
  1. The number of tons of water that a ship displaces when afloat.

  2. The capacity of a merchant ship in units of 100 cubic feet.

  3. A duty or charge per ton on cargo, as at a port or canal.

  4. The total shipping of a country or port, figured in tons, with reference to carrying capacity.

  5. Weight measured in tons.


[ton + -age. Sense 3, Middle English, from Old French, from tonne, tun; see tonne.]
The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2009 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Encyclopedia

tonnage

in shipping, the total number of tons registered or carried, or the total carrying capacity.

Learn more about tonnage with a free trial on Britannica.com.

Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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