ton

1. (n) Any of various units of mass, originally notionally equal to the contents of a tun, particularly: 2. (n) The short ton of 2000 pounds (about 907 kg), 20 hundredweights of 100 pounds avoirdupois each. 3. (n) The long ton of 2240 pounds (about 1016 kg), 20 hundredweights of 112 pounds avoirdupois each. 4. (n) The metric ton of 1000 kilograms (about 2205 lb), 10 quintals of 100 kilograms each. 5. (n) (figuratively) Any large, excessive, or overwhelming amount of anything. 6. (n) (HVAC) A unit of thermal power equal to 12,000 BTU/h (about 3.5 kW), approximating the idealized rate of cooling provided by uniform isothermal melting of 1 short ton of ice per day at 0°C. 7. (n) Any of various units of volume, originally notionally equal to the contents of a tun, particularly: 8. (n) The measurement ton of (US) 40 or (UK) 42 cubic feet (about 1.1 or 1.2 m³). 9. (n) The register ton of 100 cubic feet (about 2.83 m³). 10. (n) (colloquial, chiefly UK) Synonym of hundred, particularly: 11. (n) 100 pounds sterling. 12. (n) (darts, snooker, etc.) 100 points. 13. (n) (cricket) 100 runs. 14. (n) A speed of 100 mph. 15. (n) Fashion, the current style, the vogue. 16. (n) Fashionable society; those in style. 17. (n) Synonym of tunny, particularly the common tunny or horse mackerel. 18. (n) Initialism of threshold odor number.