WordWeb Online

1. (used of conduct or character) deserving or bringing disgrace or shame
   "a shameful display of cowardice";
   - black, disgraceful, ignominious, inglorious, opprobrious
    
2. Giving offence to moral sensibilities and injurious to reputation
   "the wicked rascally shameful conduct of the bankrupt";
   - disgraceful, scandalous, shocking

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

Encyclopedia: Shameful