Tonnage Definition
 tŭnĭj 
  tonnages
  
    noun
  
 
    tonnages
  
A duty or tax on ships, based on tons carried.
 Webster's New World 
A charge per ton on cargo or freight on a canal, at a port, etc.
 Webster's New World 
The weight of water displaced by a warship, expressed in long tons.
 Webster's New World 
The carrying capacity of a ship, expressed in register tons.
 Webster's New World 
The total amount of shipping of a country or port, calculated in tons.
 Webster's New World 
Other Word Forms of Tonnage
Noun
Singular:
 tonnagePlural:
 tonnagesOrigin of Tonnage
-  ton –age Sense 3, Middle English from Old French from tonne tun tonne From American Heritage Dictionary of the English Language, 5th Edition 
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