The Collaborative International Dictionary of English v.0.48:

Ungracious \Un*gra"cious\, a.
   1. Not gracious; showing no grace or kindness; being without
      good will; unfeeling. --Shak.
      [1913 Webster]

   2. Having no grace; graceless; wicked. [Obs.] --Shak.
      [1913 Webster]

   3. Not well received; offensive; unpleasing; unacceptable;
      not favored.
      [1913 Webster]

            Anything of grace toward the Irish rebels was as
            ungracious at Oxford as at London.    --Clarendon.
      [1913 Webster] -- Un*gra"cious*ly, adv. --
      Un*gra"cious*ness, n.
      [1913 Webster]

WordNet (r) 3.0 (2006):

ungracious
    adj 1: lacking charm and good taste; "an ungracious industrial
           city"; "this curt summary is not meant to be ungracious";
           "ungracious behavior" [ant: gracious]
    2: lacking social graces [syn: discourteous, ungracious]

Moby Thesaurus II by Grady Ward, 1.0:

47 Moby Thesaurus words for "ungracious":
   abrupt, bluff, brusque, churlish, closed, disagreeable,
   discourteous, disrespectful, gauche, gruff, ill, ill-bred,
   impolite, inaffable, inhospitable, insolent, overbearing, rude,
   surly, unaccommodating, unaffectionate, unamiable, unbenign,
   unbenignant, unceremonious, uncivil, uncompassionate,
   uncompassioned, uncomplaisant, uncordial, uncourteous, uncourtly,
   unfriendly, ungallant, ungenial, ungentlemanly, unhospitable,
   unkind, unkindly, unladylike, unloving, unmannerly, unneighborly,
   unpolite, unreceptive, unsympathetic, unsympathizing