WordWeb Online

1. Giving offence to moral sensibilities and injurious to reputation
   "disgraceful behaviour";
   - scandalous, shameful, shocking
    
2. (used of conduct or character) deserving or bringing disgrace or shame
   "Man...has written one of his most disgraceful records as a destroyer on the oceanic islands";
   - black, ignominious, inglorious, opprobrious, shameful

See also: dishonorable [US], dishonourable [Brit, Cdn], immoral

Encyclopedia: Disgraceful