'Tunnage' definitions:

Definition of 'tunnage'

(from WordNet)
noun
A tax imposed on ships that enter the US; based on the tonnage of the ship [syn: tonnage, tunnage, tonnage duty]

Definition of 'Tunnage'

From: GCIDE
  • Tunnage \Tun"nage\ (t[u^]n"n[asl]j; 48), n. [From Tun; cf. Tonnage.] See Tonnage. [1913 Webster]