affluent

American Heritage® Dictionary of the English Language, Fourth Edition

1. adj. Generously supplied with money, property, or possessions; prosperous or rich. See Synonyms at rich.
2. adj. Plentiful; abundant.
3. adj. Flowing freely; copious.
4. n. A stream or river that flows into a larger one; a tributary.
5. n. A person who is well-off financially: "the so-called emerging affluents” ( Leslie Tweeton).

Century Dictionary and Cyclopedia

1. Flowing to: as, “affluent blood,” Harvey, Consumption.
2. Abundant; copious; abounding in anything, as attributes, attainments, or possessions; hence, specifically, abounding in means; rich: as, a man of affluent intellect; an affluent man or community; affluent circumstances.
3. n. A tributary stream; a stream or river flowing into another, or into a lake, bay, etc.

Wiktionary

1. n. this sense) Somebody who is wealthy.
2. n. A stream or river flowing into a larger river or into a lake; a tributary stream; a tributary.
3. adj. Abundant; copious; plenteous.
4. adj. by extension Abounding in goods or riches; materially wealthy.
5. adj. dated tributary

GNU Webster's 1913

1. adj. Flowing to; flowing abundantly.
2. adj. Abundant; copious; plenteous; hence, wealthy; abounding in goods or riches.
3. n. A stream or river flowing into a larger river or into a lake; a tributary stream.

WordNet 3.0

1. n. an affluent person; a person who is financially well off
2. n. a branch that flows into the main stream
3. adj. having an abundant supply of money or possessions of value