A US unit of weight equal to 2,000 pounds, or about 907 kilograms.
The truck weighs five tons.
They bought a two-ton truck.
In American English, a ton normally means 2,000 pounds. A metric ton is 1,000 kilograms.
Common phrases & grammar
a two-ton truck · weigh several tons · a ton of coal
weigh + number + ton(s)
a + number + -ton + noun