What is the definition of mansion?

Beginners

A mansion is a very large, impressive, and often expensive house.

Intermediate

The word "mansion" typically refers to a large and impressive house, often one that is occupied by a wealthy or influential person or family. It can also refer to a large and luxurious residence or estate.

Advanced

The word mansion, in an advanced sense, refers to a large and impressive house that is typically (though not always) occupied by wealthy individuals or families. The term is often used to describe homes that feature grand architectural designs, luxurious furnishings and amenities, and expansive grounds or gardens. In some cases, the term may also be used more broadly to refer to any sizable dwelling, particularly one that is stately or imposing in appearance.