Source : Webster's Revised Unabridged Dictionary (1913)

Customhouse \Cus"tom*house"\ (-hous`), n.
   The building where customs and duties are paid, and where
   vessels are entered or cleared.

   {Customhouse broker}, an agent who acts for merchants in the
      business of entering and clearing goods and vessels.

Source : WordNet®

customhouse
     n : a government building where customs are collected and where
         ships are cleared to enter or leave the country [syn: {customshouse}]