The Collaborative International Dictionary of English v.0.48:

Please \Please\, v. i.
   1. To afford or impart pleasure; to excite agreeable
      emotions.
      [1913 Webster]

            What pleasing scemed, for her now pleases more.
                                                  --Milton.
      [1913 Webster]

            For we that live to please, must please to live.
                                                  --Johnson.
      [1913 Webster]

   2. To have pleasure; to be willing, as a matter of affording
      pleasure or showing favor; to vouchsafe; to consent.
      [1913 Webster]

            Heavenly stranger, please to taste
            These bounties.                       --Milton.
      [1913 Webster]

            That he would please 8give me my liberty. --Swift.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Please \Please\, v. t. [imp. & p. p. Pleased; p. pr. & vb. n.
   Pleasing.] [OE. plesen, OF. plaisir, fr. L. placere, akin
   to placare to reconcile. Cf. Complacent, Placable,
   Placid, Plea, Plead, Pleasure.]
   1. To give pleasure to; to excite agreeable sensations or
      emotions in; to make glad; to gratify; to content; to
      satisfy.
      [1913 Webster]

            I pray to God that it may plesen you. --Chaucer.
      [1913 Webster]

            What next I bring shall please thee, be assured.
                                                  --Milton.
      [1913 Webster]

   2. To have or take pleasure in; hence, to choose; to wish; to
      desire; to will.
      [1913 Webster]

            Whatsoever the Lord pleased, that did he. --Ps.
                                                  cxxxv. 6.
      [1913 Webster]

            A man doing as he wills, and doing as he pleases,
            are the same things in common speech. --J. Edwards.
      [1913 Webster]

   3. To be the will or pleasure of; to seem good to; -- used
      impersonally. "It pleased the Father that in him should
      all fullness dwell." --Col. i. 19.
      [1913 Webster]

            To-morrow, may it please you.         --Shak.
      [1913 Webster]

   To be pleased in or To be pleased with, to have
      complacency in; to take pleasure in.

   To be pleased to do a thing, to take pleasure in doing it;
      to have the will to do it; to think proper to do it.
      --Dryden.
      [1913 Webster]

WordNet (r) 3.0 (2006):

please
    adv 1: used in polite request; "please pay attention"
    v 1: give pleasure to or be pleasing to; "These colors please
         the senses"; "a pleasing sensation" [syn: please,
         delight] [ant: displease]
    2: be the will of or have the will (to); "he could do many
       things if he pleased"
    3: give satisfaction; "The waiters around her aim to please"

The Devil's Dictionary (1881-1906):

PLEASE, v.  To lay the foundation for a superstructure of imposition.