noun
gross tonnage; aggregate tonnage
Maritime term for the total internal volume of a ship, measured in gross tons.
この船の総トン数は約10万トンです。
The gross tonnage of this ship is about 100,000 tons.
Contains outdated kanji 噸; rarely used today.
Compound of 総 (そう, 'total') + トン (ton) + 数 (すう, 'number/amount'), literally 'total ton number'.