Bond

1. A certificate of debt issued by a government or corporation guaranteeing payment of the original investment plus interest on or before a certain date. We bought war bonds to help win the war.
2. Something, such as a cord or band, that binds, ties or fastens something together. The glue helped bond the papers together.
3. A duty, a promise, or another obligation by which one is bound. The bond between soldiers helps them survive.
4. The condition of taxable goods being stored in a warehouse until taxes or duties owed on them are paid. You have to post a bond before the goods can be released.