- The definition of an heiress is a woman who inherits a lot of money.
A woman who is going to inherit $1 million and a castle is an example of an heiress.
heiress definition by Webster's New World
Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio. Used by arrangement with John Wiley & Sons, Inc.
a female heir, esp. to great wealth
heiress definition by American Heritage Dictionary
A woman who is an heir, especially to great wealth. See Usage Note at -ess.