The Collaborative International Dictionary of English v.0.48:

Play \Play\, v. i. [imp. & p. p. Played; p. pr. & vb. n.
   Playing.] [OE. pleien, AS. plegian, plegan, to play, akin
   to plega play, game, quick motion, and probably to OS. plegan
   to promise, pledge, D. plegen to care for, attend to, be
   wont, G. pflegen; of unknown origin. [root]28. Cf. Plight,
   n.]
   1. To engage in sport or lively recreation; to exercise for
      the sake of amusement; to frolic; to spot.
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            As Cannace was playing in her walk.   --Chaucer.
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            The lamb thy riot dooms to bleed to-day,
            Had he thy reason, would he skip and play! --Pope.
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            And some, the darlings of their Lord,
            Play smiling with the flame and sword. --Keble.
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   2. To act with levity or thoughtlessness; to trifle; to be
      careless.
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            "Nay," quod this monk, "I have no lust to pleye."
                                                  --Chaucer.
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            Men are apt to play with their healths. --Sir W.
                                                  Temple.
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   3. To contend, or take part, in a game; as, to play ball;
      hence, to gamble; as, he played for heavy stakes.
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   4. To perform on an instrument of music; as, to play on a
      flute.
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            One that . . . can play well on an instrument.
                                                  --Ezek.
                                                  xxxiii. 32.
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            Play, my friend, and charm the charmer. --Granville.
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   5. To act; to behave; to practice deception.
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            His mother played false with a smith. --Shak.
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   6. To move in any manner; especially, to move regularly with
      alternate or reciprocating motion; to operate; to act; as,
      the fountain plays.
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            The heart beats, the blood circulates, the lungs
            play.                                 --Cheyne.
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   7. To move gayly; to wanton; to disport.
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            Even as the waving sedges play with wind. --Shak.
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            The setting sun
            Plays on their shining arms and burnished helmets.
                                                  --Addison.
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            All fame is foreign but of true desert,
            Plays round the head, but comes not to the heart.
                                                  --Pope.
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   8. To act on the stage; to personate a character.
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            A lord will hear your play to-night.  --Shak.
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            Courts are theaters where some men play. --Donne.
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   To play into a person's hands, to act, or to manage
      matters, to his advantage or benefit.

   To play off, to affect; to feign; to practice artifice.

   To play upon.
      (a) To make sport of; to deceive.
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                Art thou alive?
                Or is it fantasy that plays upon our eyesight.
                                                  --Shak.
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      (b) To use in a droll manner; to give a droll expression
          or application to; as, to play upon words.
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