penthouse.

1. An apartment on the highest floor of a building, often with extra space or a terrace.

2. A small structure on a roof housing machinery or access to the building.

Use it for

Words that belong together

• rooftop penthouse
• penthouse apartment

On the page

The penthouse terrace overlooked the crowded avenues.

Usage notes

Primary category: architecture / spatial description. Forms: Singular penthouse; plural penthouses. Legacy lexical fields mirror sense 1 only. Use numbered sense fields for all meanings. Established modern English lexical item. No separate regional spelling or grammatical inflection entry. Writing functions: setting, description. Commonness: moderately common.