McMansion Definition
mĭk-mănshən
noun
A large new house, usually constructed as part of a suburban development and characterized by ostentation rather than quality of workmanship or architectural distinction.
American Heritage
Other Word Forms of McMansion
Noun
Singular:
McMansion
Plural:
mcmansionsOrigin of McMansion
Mc(Donald's) trademark of a fast-food restaurant chain (from its mass-produced nature) mansion
From American Heritage Dictionary of the English Language, 5th Edition