Source : Webster's Revised Unabridged Dictionary (1913)

Saintly \Saint"ly\, a. [Compar. {Saintlier}; superl.
   {Saintliest}.]
   Like a saint; becoming a holy person.

         So dear to Heaven is saintly chastity.   --Milton.

Source : WordNet®

saintly
     adj : marked by utter benignity; resembling or befitting an angel
           or saint; "angelic benificence"; "a beatific smile"; "a
           saintly concern for his fellow men"; "my sainted
           mother" [syn: {angelic}, {angelical}, {beatific}, {saintlike},
            {sainted}]