Source : Webster's Revised Unabridged Dictionary (1913)

Handball \Hand"ball`\, n.
   1. A ball for throwing or using with the hand.

   2. A game played with such a ball, as by players striking it
      to and fro between them with the hands, or alternately
      against a wall, until one side or the other fails to
      return the ball.

Source : WordNet®

handball
     n 1: a small rubber ball used in the game of handball
     2: a game played in a walled court or against a single wall by
        two or four players who strike a rubber ball with their
        hands