Source : Webster's Revised Unabridged Dictionary (1913)

Shameful \Shame"ful\, a.
   1. Bringing shame or disgrace; injurious to reputation;
      disgraceful.

            His naval preparations were not more surprising than
            his quick and shameful retreat.       --Arbuthnot.

   2. Exciting the feeling of shame in others; indecent; as, a
      shameful picture; a shameful sight. --Spenser.

   Syn: Disgraceful; reproachful; indecent; unbecoming;
        degrading; scandalous; ignominious; infamous. --
        {Shame"ful*ly}, adv. -- {Shame"ful*ness}, n.

Source : WordNet®

shameful
     adj 1: (used of conduct or character) deserving or bringing
            disgrace or shame; "Man...has written one of his
            blackest records as a destroyer on the oceanic
            islands"- Rachel Carson; "an ignominious retreat";
            "inglorious defeat"; "an opprobrious monument to human
            greed"; "a shameful display of cowardice" [syn: {black},
             {disgraceful}, {ignominious}, {inglorious}, {opprobrious}]
     2: giving offense to moral sensibilities and injurious to
        reputation; "scandalous behavior"; "the wicked rascally
        shameful conduct of the bankrupt"- Thackeray; "the most
        shocking book of its time" [syn: {disgraceful}, {scandalous},
         {shocking}]