The Collaborative International Dictionary of English v.0.48:

Sleight \Sleight\, n. [OE. sleighte, sleihte, sleithe, Icel.
   sl?g? (for sl?g?) slyness, cunning, fr. sl?gr (for sl?gr)
   sly, cunning. See Sly.]
   1. Cunning; craft; artful practice. [Obs.] "His sleight and
      his covin." --Chaucer.
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   2. An artful trick; sly artifice; a feat so dexterous that
      the manner of performance escapes observation.
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            The world hath many subtle sleights.  --Latimer.
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   3. Dexterous practice; dexterity; skill. --Chaucer. "The
      juggler's sleight." --Hudibras.
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   Sleight of hand, legerdemain; prestidigitation.
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WordNet (r) 3.0 (2006):

sleight of hand
    n 1: manual dexterity in the execution of tricks [syn:
         prestidigitation, sleight of hand]