The Collaborative International Dictionary of English v.0.48:

Importation \Im`por*ta"tion\, n. [Cf. F. importation. See
   Import, v. t.]
   1. The act of carrying, conveying, or delivering. [R.]
      [1913 Webster]

   2. The act or practice of importing, or bringing into a
      country or state; -- opposed to exportation.
      [1913 Webster]

   3. That which is imported; commodities or wares introduced
      into a country from abroad.
      [1913 Webster]

WordNet (r) 3.0 (2006):

importation
    n 1: the commercial activity of buying and bringing in goods
         from a foreign country [syn: importing, importation]
    2: commodities (goods or services) bought from a foreign country
       [syn: import, importation] [ant: export, exportation]