The Collaborative International Dictionary of English v.0.48:

Sport \Sport\ (sp[=o]rt), n. [Abbreviated from disport.]
   1. That which diverts, and makes mirth; pastime; amusement.
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            It is as sport to a fool to do mischief. --Prov. x.
                                                  23.
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            Her sports were such as carried riches of knowledge
            upon the stream of delight.           --Sir P.
                                                  Sidney.
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            Think it but a minute spent in sport. --Shak.
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   2. Mock; mockery; contemptuous mirth; derision.
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            Then make sport at me; then let me be your jest.
                                                  --Shak.
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   3. That with which one plays, or which is driven about in
      play; a toy; a plaything; an object of mockery.
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            Flitting leaves, the sport of every wind. --Dryden.
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            Never does man appear to greater disadvantage than
            when he is the sport of his own ungoverned passions.
                                                  --John Clarke.
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   4. Play; idle jingle.
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            An author who should introduce such a sport of words
            upon our stage would meet with small applause.
                                                  --Broome.
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   5. Diversion of the field, as fowling, hunting, fishing,
      racing, games, and the like, esp. when money is staked.
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   6. (Bot. & Zool.) A plant or an animal, or part of a plant or
      animal, which has some peculiarity not usually seen in the
      species; an abnormal variety or growth. See Sporting
      plant, under Sporting.
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   7. A sportsman; a gambler. [Slang]
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   In sport, in jest; for play or diversion. "So is the man
      that deceiveth his neighbor, and saith, Am not I in
      sport?" --Prov. xxvi. 19.
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   Syn: Play; game; diversion; frolic; mirth; mock; mockery;
        jeer.
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