affluent

from The American Heritage® Dictionary of the English Language, 5th Edition.

• adjective Generously supplied with money, property, or possessions; prosperous or rich. synonym: rich.
• adjective Manifesting or requiring wealth.
• adjective Archaic Flowing freely; copious.
• noun A stream or river that flows into a larger one; a tributary.
• noun A person who is well-off financially.
• noun Wealthy people considered as a group. Often used with the.

from The Century Dictionary.

• Flowing to: as, “affluent blood,” Harvey, Consumption.
• 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.
• noun A tributary stream; a stream or river flowing into another, or into a lake, bay, etc.

from the GNU version of the Collaborative International Dictionary of English.

• noun A stream or river flowing into a larger river or into a lake; a tributary stream.
• adjective Flowing to; flowing abundantly.
• adjective Abundant; copious; plenteous; hence, wealthy; abounding in goods or riches.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun this sense) Somebody who is wealthy.
• noun A stream or river flowing into a larger river or into a lake; a tributary stream; a tributary.
• adjective Abundant; copious; plenteous.
• adjective by extension Abounding in goods or riches; materially wealthy.
• adjective dated tributary

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun an affluent person; a person who is financially well off
• noun a branch that flows into the main stream
• adjective having an abundant supply of money or possessions of value