The Collaborative International Dictionary of English v.0.48:

Game \Game\ (g[=a]m), v. i. [imp. & p. p. Gamed (g[=a]md); p.
   pr. & vb. n. Gaming.] [OE. gamen, game?en, to rejoice, AS.
   gamenian to play. See Game, n.]
   1. To rejoice; to be pleased; -- often used, in Old English,
      impersonally with dative. [Obs.]
      [1913 Webster]

            God loved he best with all his whole hearte
            At alle times, though him gamed or smarte.
                                                  --Chaucer.
      [1913 Webster]

   2. To play at any sport or diversion.
      [1913 Webster]

   3. To play for a stake or prize; to use cards, dice,
      billiards, or other instruments, according to certain
      rules, with a view to win money or some other thing waged
      upon the issue of the contest; to gamble.
      [1913 Webster] gamebag

The Collaborative International Dictionary of English v.0.48:

gaming \gam"ing\ (g[=a]m"[i^]ng), n.
   The act or practice of playing games for stakes or wagers;
   gambling.
   [1913 Webster]

WordNet (r) 3.0 (2006):

gaming
    n 1: the act of playing for stakes in the hope of winning
         (including the payment of a price for a chance to win a
         prize); "his gambling cost him a fortune"; "there was heavy
         play at the blackjack table" [syn: gambling, gaming,
         play]