What is Ton ?
Ton is (noun) 1. a measure of weight equal to 2240 pounds a ship carrying 1000 tons of coal 2. it weighs a ton it is very heavy (informal.) Your suitcase weighs a ton, what have you got in it? tons of something lots of something (informal.) I’ve tons of work to do. She had tons of cards on her 21st birthday.
source: Easier English, Student Dictionary Upper Intermediate Level