Im"post (?), n. [OF. impost, F. impot, LL. impostus, fr. L. impostus, p. p. of imponere to impose. See Impone.]

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.

Even the ship money . . . Johnson could not pronounce to have been an unconstitutional impost. Macaulay.

2. Arch.

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

⇒ The impost is called continuous, if the moldings of the arch or architrave run down the jamb or pier without a break.

Syn. -- Tribute; excise; custom; duty; tax.

 

© Webster 1913.

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