Webster 1913 Edition
Placed under, or covered by, a bond, as for the payment of duties, or for conformity to certain regulations.
goods placed in a bonded warehouse; goods, for the duties on which bonds are given at the customhouse.–
a warehouse in which goods on which the duties are unpaid are stored under bond and in the joint custody of the importer, or his agent, and the customs officers.
Webster 1828 Edition