What does affluent mean?
The definition of affluent
Af”flu*ent, a.
Etym: [Cf. F. affluent, L. affluens, -entis, p. pr. See Affluence.]

1 Flowing to; flowing abundantly. “Affluent blood.” Harvey.
2 Abundant; copious; plenteous; hence, wealthy; abounding in goods or riches. Language . . . affluent in expression. H. Reed. Loaded and blest with all the affluent store, Which human vows at smoking shrines implore. Prior.

Af”flu*ent, n.
A stream or river flowing into a larger river or into a lake; a tributary stream.