WordWeb Online

1. In fortunate circumstances financially; moderately rich
   "a prosperous family";
   - comfortable, easy, well-fixed, well-heeled, well-off, well-situated, well-to-do
    
2. Very lively and profitable
   "a prosperous new business";
   - booming, flourishing, palmy, prospering, roaring, thriving
    
3. Marked by peace and prosperity
   "a prosperous era";
   - golden, halcyon
    
4. Presaging or likely to bring good luck or a good outcome
   "a prosperous moment to make a decision";
   - golden, favorable [US], favourable [Brit, Cdn], lucky

See also: happy, propitious, rich, successful

Encyclopedia: Prosperous