Definition from Wiktionary, the free dictionary
Only relation to antonym indigence is common Latinate suffix; affluence only acquired sense of wealth in 16th century English and French, while indigent meant “poor” in Latin.
- (obsolete) An abundant flow or supply.
- An abundance of wealth.
- His affluence was surpassed by no man.
- A moderate level of wealth.
- The had achieved affluence, but aspired to true wealth.
- An influx.
- See also Wikisaurus:wealth
Related terms 
a large amount of wealth
affluence f (plural affluences)