The Collaborative International Dictionary of English v.0.48:

Displease \Dis*please"\, v. t. [imp. & p. p. Displeased; p.
   pr. & vb. n. Displeasing.] [OF. desplaisir, whence F.
   d['e]plaisir displeasure; pref. des- (L. dis-) + plaisir to
   please. See Please, and cf. Displeasure.]
   1. To make not pleased; to excite a feeling of disapprobation
      or dislike in; to be disagreeable to; to offend; to vex;
      -- often followed by with or at. It usually expresses less
      than to anger, vex, irritate, or provoke.
      [1913 Webster]

            God was displeased with this thing.   --1 Chron.
                                                  xxi. 7.
      [1913 Webster]

            Wilt thou be displeased at us forever? --Psalms
                                                  lxxxv. 5 (Bk.
                                                  of Com.
                                                  Prayer).
      [1913 Webster]

            This virtuous plaster will displease
            Your tender sides.                    --J. Fletcher.
      [1913 Webster]

            Adversity is so wholesome . . . why should we be
            displeased therewith?                 --Barrow.
      [1913 Webster]

   2. To fail to satisfy; to miss of. [Obs.]
      [1913 Webster]

            I shall displease my ends else.       --Beau. & Fl.

   Syn: To offend; disgust; vex; annoy; dissatisfy; chafe;
        anger; provoke; affront.
        [1913 Webster]

WordNet (r) 3.0 (2006):

displeased
    adj 1: not pleased; experiencing or manifesting displeasure
           [ant: pleased]

Moby Thesaurus II by Grady Ward, 1.0:

67 Moby Thesaurus words for "displeased":
   against, allergic, averse, beefing, bellyaching, bitching,
   complaining, complaintful, con, crabbing, crabby, cranky, croaking,
   disaffected, disappointed, disapprobatory, disapproving,
   discontented, disenchanted, disgruntled, disillusioned,
   disinclined, dissatisfied, dissenting, envious, faultfinding,
   griping, grouchy, grousing, growling, grumbling, hostile,
   indignant, low, malcontent, malcontented, murmuring, muttering,
   not charmed, opposed, opposing, out of humor, peevish, petulant,
   poor, put off, querulant, querulous, rebellious, resentful,
   restive, restless, sulky, turned-off, unaccepting, unaccommodating,
   unappreciative, unapproving, uncomplimentary, uneasy, unfavorable,
   unfriendly, unfulfilled, ungratified, unhappy, unsatisfied,
   whiny