WordWeb Online

1. Take temporary possession of as a security, by legal authority
   "The customs agents impounded the illegal shipment";
   - attach, sequester, confiscate, seize, sequestrate
    
2. Place or shut up in a pound
   "impound the cows so they don't stray";
   - pound

Derived forms: impounds, impounding, impounded

Type of: confine, constrain, hold, restrain, take

Encyclopedia: Impound