Impost Topics referred to by the same term From Wikipedia, the free encyclopedia Impost may mean: A type of tax, especially a tax levied on imports A handicap (usually a lead weight) used in horse racing Impost (architecture): a block or capital on which an arch rests This disambiguation page lists articles associated with the title Impost.If an internal link incorrectly led you here, you may wish to change the link to point directly to the intended article. Look up impost in Wiktionary, the free dictionary. Related Articles