ton 
/ˈtʌn/ noun
plural tons /ˈtʌn/ noun [count] 1 plural also ton a US : a unit for measuring weight that equals 2,000 pounds (907 kilograms)
b Brit : a unit for measuring weight that equals 2,240 pounds (1,016 kilograms) — see also megaton, metric ton 2 informal : a large amount
▪ I still have a ton to do before the guests arrive. ▪ Her purse weighs a ton. [=is very heavy] — often + of ▪ He earns a ton of money. ▪ I've got tons of homework to do.
b Brit : a unit for measuring weight that equals 2,240 pounds (1,016 kilograms) — see also megaton, metric ton
▪ I still have a ton to do before the guests arrive. ▪ Her purse weighs a ton. [=is very heavy] — often + of ▪ He earns a ton of money. ▪ I've got tons of homework to do.
like a ton of bricks — see 1brick
