from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A person whose wealth amounts to at least a billion dollars, pounds, or the equivalent in other currency.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. Somebody whose wealth is greater than one billion (109) dollars, or other currency.
from The Century Dictionary and Cyclopedia
- n. One who possesses property worth a billion reckoned in standard coin of the country.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. a very rich person whose material wealth is valued at more than a billion dollars
billion + (million)aire.(American Heritage® Dictionary of the English Language, Fourth Edition)