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
