Penthouse Definition

pĕnthous
noun
An apartment or other houselike structure built upon the roof of a building.
Webster's New World
A small structure, esp. one with a sloping roof, attached to a larger building.
Webster's New World
A sloping roof, or, sometimes, an awning, etc. extending out from a wall or building.
Webster's New World
A luxury apartment on an upper floor, esp. the top floor, of a building.
Webster's New World
The sloping roof that rises from the inner wall to the outer wall surrounding three sides of the court in court tennis, off which the ball is served.
American Heritage

Other Word Forms of Penthouse

Noun

Singular:
penthouse
Plural:
penthouses

Origin of Penthouse

  • Alteration of Middle English pentis, pentace a shed attached to a wall of a building from Anglo-Norman pentiz penthouses from Old French apentiz penthouse from apent past participle of apendre to belong, depend from Medieval Latin appendere from Latin to hang, suspend append

    From American Heritage Dictionary of the English Language, 5th Edition

  • From Anglo-Norman pentiz (“pentice"), from apendiz (“appentice"), ultimately from a suffixed form of Latin appendō (“I append").

    From Wiktionary

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