noun

• Any of various units of mass, (historical) originally notionally equal to the contents of a tun, particularly
• The short ton of 2000 pounds (about 907 kg), 20 hundredweights of 100 pounds avoirdupois each.
• The long ton of 2240 pounds (about 1016 kg), 20 hundredweights of 112 pounds avoirdupois each.
• The metric ton of 1000 kilograms, 10 quintals of 100 kilograms each.
• Any of various units of volume, (historical) originally notionally equal to the contents of a tun, particularly
• The measurement ton of (US) 40 or (UK) 42 cubic feet (about 1.1 or 1.2 m³).
• The register ton of 100 cubic feet (about 2.83 m³).
• (figuratively) Any large, excessive, or overwhelming amount of anything.
• (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.
• (slang, chiefly UK) Synonym of hundred, particularly
• 100 pounds sterling.
• (darts, snooker, etc.) 100 points.
• (cricket) 100 runs.
• A speed of 100 mph.
• Fashion, the current style, the vogue.
• Fashionable society; those in style.
• Synonym of tunny, particularly the common tunny or horse mackerel.
• Initialism of threshold odor number.