key money 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.
money paid covertly, and usually illegally, by a prospective tenant, as to a landlord, to increase the likelihood of being able to lease an apartment in an area where housing is scarce
key money definition by American Heritage Dictionary
Payment made to a landlord as an inducement to assure a rental.