mansion
n. countablen. a very large, expensive, and impressive house. It usually has many rooms and belongs to a wealthy person.
n. a large, impressive, and stately residence. Typically associated with extreme wealth or historical significance.
The movie star lives in a huge mansion on the hill.
After winning the lottery, the couple moved from their small apartment into a historic mansion with ten bedrooms.
The sprawling mansion stood as a testament to the family's industrial wealth, featuring marble hallways and gardens that stretched toward the horizon.
Inherited from Middle English mansioun, borrowed from Anglo-Norman mansion, mansiun, from Latin mānsiō (“dwelling, stopping-place”), from the past participle stem of manēre (“stay”). By surface analysis, manse + -ion.