Source : Webster's Revised Unabridged Dictionary (1913)

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.

            I pray to God that it may plesen you. --Chaucer.

            What next I bring shall please thee, be assured.
                                                  --Milton.

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

            Whatsoever the Lord pleased, that did he. --Ps.
                                                  cxxxv. 6.

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

   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.

            To-morrow, may it please you.         --Shak.

   {To be pleased in} or {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.

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

            What pleasing scemed, for her now pleases more.
                                                  --Milton.

            For we that live to please, must please to live.
                                                  --Johnson.

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

            Heavenly stranger, please to taste These bounties.
                                                  --Milton.

            That he would please 8give me my liberty. --Swift.

Source : WordNet®

please
     adv : used in polite request; "please pay attention"

please
     v 1: give pleasure to or be pleasing to; "These colors please the
          senses"; "a pleasing sensation" [syn: {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"