Definition of tonnage
1 a
: the cubical content of a merchant ship in units of 100 cubic feet
b
: the displacement of a warship
2 a
: total weight in tons shipped, carried, or produced
b
: impressively large amount or weight
3
: a duty formerly levied on every tun of wine imported into England
4 a
: a duty or impost on vessels based on cargo capacity
b
: a duty on goods per ton transported
5
: ships in terms of the total number of tons registered or carried or of their carrying capacity
