Definition of ton noun from the Oxford Advanced Learner's Dictionary

      

    ton

     noun
    noun
    BrE BrE//tʌn//
     
    ; NAmE NAmE//tʌn//
     
     
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  1. 1   [countable] (pl. tons, ton) a unit for measuring weight, in Britain 2 240 pounds (long ton) and in the US 2 000 pounds (short ton) (informal) What have you got in this bag? It weighs a ton! compare tonne
  2. 2 [countable] a unit for measuring the size of a ship. 1 ton is equal to 100 cubic feet.
  3. 3tons [plural] (informal) a lot They've got tons of money. I've still got tons to do.
  4. 4a/the ton (British English, informal) 100, especially when connected with a speed of 100 miles per hour He was caught doing a ton.
  5. Word Origin Middle English: variant of tun, both spellings being used for the container and the weight. The senses were differentiated in the late 17th cent.Idioms (informal) very heavily; very severely Disappointment hit her like a ton of bricks. They came down on him like a ton of bricks (= criticized him very severely).
See the Oxford Advanced American Dictionary entry: ton