WordWeb Online

1. In deplorable condition
   "a broken-down fence";
   - bedraggled, derelict, dilapidated, ramshackle, tatterdemalion, tumble-down, derro [Austral, NZ, informal], dero [Austral, NZ, informal]
    
2. Not in working order
   "had to push the broken-down car"; "a broken-down tractor fit only for children to play on";
   - cactus [Austral, NZ, informal]

See also: damaged, unserviceable

Encyclopedia: Broken-down