›to make people or businesses pay an amount of money to the government from the money they earn, or when they buy goods or services: The state does not tax food or clothing.tax sth as sthThe profits from these investments are taxed as ordinary income.tax sth at (a rate of) sthEarnings above the current threshold are taxed at 50%.tax sb on sthHomeowners who sell land for development are taxed on the profit.tax sb/sth heavily/lightlyThe government may tax housing more heavily.Non-electrical machines are lightly taxed.