Noah Webster's Dictionary 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.

Multi-Version Concordance Impost (2 Occurrences) Ezra 4:13 Be it known now unto the king, that, if this city be builded, and the walls finished, they will not pay tribute, custom, or toll, and in the end it will be hurtful unto the kings. (See JPS) Ezra 4:20 There have been mighty kings also over Jerusalem, who have ruled over all the country beyond the River; and tribute, custom, and toll, was paid unto them. (See JPS)