The Collaborative International Dictionary of English v.0.48:

Handy \Hand"y\ (h[a^]nd"[y^]), a. [Compar. Handier
   (-[i^]*[~e]r); superl. Handiest.] [OE. hendi, AS. hendig
   (in comp.), fr. hand hand; akin to D. handig, Goth. handugs
   clever, wise.]
   1. Performed by the hand. [Obs.]
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            To draw up and come to handy strokes. --Milton.
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   2. Skillful in using the hand; dexterous; ready; adroit.
      "Each is handy in his way." --Dryden.
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   3. Ready to the hand; near; also, suited to the use of the
      hand; convenient; valuable for reference or use; as, my
      tools are handy; a handy volume.
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   4. (Naut.) Easily managed; obedient to the helm; -- said of a
      vessel.
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WordNet (r) 3.0 (2006):

handy
    adj 1: easy to reach; "found a handy spot for the can opener"
           [syn: handy, ready to hand(p)]
    2: easy to use; "a handy gadget"
    3: skillful with the hands; "handy with an axe"
    n 1: United States blues musician who transcribed and published
         traditional blues music (1873-1958) [syn: Handy, W. C.
         Handy, William Christopher Handy]