Source : Webster's Revised Unabridged Dictionary (1913)

Handy \Hand"y\, a. [Compar. {Handier}; 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.]

            To draw up and come to handy strokes. --Milton.

   2. Skillful in using the hand; dexterous; ready; adroit.
      ``Each is handy in his way.'' --Dryden.

   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.

   4. (Naut.) Easily managed; obedient to the helm; -- said of a
      vessel.

Source : WordNet®

handiest
     See {handy}

handy
     adj 1: easy to reach; "found a handy spot for the can opener" [syn:
             {convenient}, {ready to hand(p)}]
     2: easy to use; "a handy gadget"
     3: skillful with the hands; "handy with an axe"
     [also: {handiest}, {handier}]