n. | 1. | That which is imposed or levied; a tax, tribute, or duty; especially, a duty or tax laid by goverment on goods imported into a country. |
2. | (Arch.) The top member of a pillar, pier, wall, etc., upon which the weight of an arch rests. |
Noun | 1. | impost - money collected under a tariff |
2. | impost - the lowest stone in an arch -- from which it springs Synonyms: springer |