Source : Webster's Revised Unabridged Dictionary (1913)

Well-being \Well"-be`ing\, n.
   The state or condition of being well; welfare; happiness;
   prosperity; as, virtue is essential to the well-being of men
   or of society.

Source : WordNet®

well-being
     n : a contented state of being happy and healthy and prosperous;
         "the town was finally on the upbeat after our recent
         troubles" [syn: {wellbeing}, {welfare}, {upbeat}, {eudaemonia},
          {eudaimonia}] [ant: {ill-being}]