Source : Webster's Revised Unabridged Dictionary (1913)

Karma \Kar"ma\, n. [Skr.] (Buddhism)
   One's acts considered as fixing one's lot in the future
   existence. (Theos.) The doctrine of fate as the inflexible
   result of cause and effect; the theory of inevitable
   consequence.

Source : WordNet®

karma
     n : (Hinduism and Buddhism) the effects of a person's actions
         that determine his destiny in his next incarnation