tonnage

Short definition from Wiktionary

Noun

1. 1
   The number of tons of water that a floating ship displaces.
2. 2
   The capacity of a ship's hold etc in units of 100 cubic feet.
3. 3
   The number of tons of bombs dropped in a particular region over a particular period of time.
4. 4
   A charge made on each ton of cargo when landed etc.
5. 5
   The total shipping of a fleet or nation.
6. 6
   A weight in tons, especially of cargo or freight.