1. (n.) That which is imposed or levied; a tax, tribute, or duty; especially, a duty or tax laid by government on goods imported into a country.

2. (n.) The top member of a pillar, pier, wall, etc., upon which the weight of an arch rests.

assessment blackmail call call for cess claim conscience money contribution demand demand for direct tax draft drain duty exaction extortion extortionate demand graduated taxation heavy demand imposition indent indirect tax insistent demand joint return levy nonnegotiable demand notice order progressive tax requirement requisition rush rush order separate returns single tax supertax surtax tariff tax tax base tax dodging tax evasion tax exemption tax return tax structure tax withholding tax-exempt status taxable income taxation taxing tithe toll tribute ultimatum warning withholding tax