What does dome mean?
A dome is a rounded, roughly hemispherical roof or vault that spans a space without internal support, one of architecture's most admired structural forms. From the Pantheon in Rome to St Paul's Cathedral in London, domes have crowned sacred and civic buildings for centuries because they combine strength, grandeur, and remarkable acoustics. Beyond architecture, the word describes anything dome-shaped — a hilltop, a stadium roof, a glass cover over a display, even the protective canopy of an observatory. Used figuratively, "under the dome" can suggest enclosure or shelter. The verb "to dome" means to shape something into this curve, though it appears mostly in descriptions like a "domed ceiling". Familiar collocations include "geodesic dome", popularized by Buckminster Fuller, whose lightweight lattice structures proved the form could be both ancient in inspiration and radically modern.
A rounded roof or ceiling of approximately hemispherical shape, or any structure or object resembling such a curve.
"The Capitol's cast-iron dome has dominated the Washington skyline since the 1860s."
Frequently used in architectural contexts; extended senses describe hills, stadiums, and protective covers.
To cover with a dome, or to give something a domed shape.
"The builders domed the ceiling to improve the hall's acoustics."
Rare compared to the noun; most often encountered in the adjective form "domed".
Standard regular plural.
"Travelers photographed the blue-tiled domes of the old city's mosques."
Buckminster Fuller's geodesic domes were so strong and light that the US military once considered dropping them by helicopter as ready-made buildings.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of dome
English borrowed "dome" in the early 17th century from French "dôme", which itself traces back to Latin "domus", meaning house. The word was influenced by Italian "duomo", the term for a cathedral, which helped shift its sense toward a grand architectural roof. It shares its ultimate root with words such as "domestic" and "domicile", all descended from the Latin word for home.
Related word forms
How dome is actually used
Mostly neutral register, common in architecture and everyday description. The verb sense ("the ceiling is domed") is comparatively rare and usually appears in passive form.
Easily confused with dome
"Dome" is a curved architectural roof, while "doom" means death, ruin, or an inescapable fate.