Definition

Noun: A dome that is shaped like a bulb, typically with a point at the top and a profile that swells outward before tapering in. This architectural feature is characteristic of Russian Orthodox and Byzantine church architecture.

Usage

The term "onion dome" is used to describe a specific, ornate architectural element found on churches, cathedrals, and other significant buildings, primarily within the historical and cultural context of Eastern Orthodox Christianity. It functions as a countable noun.

Examples

• The most striking feature of St. Basil's Cathedral is its colorful onion domes.
• Many traditional Russian churches are crowned with a single gilded onion dome.
• The architecture of the monastery was distinguished by its blue onion domes adorned with stars.

Advanced Usage

• The phrase is often used in art historical and architectural descriptions to classify and discuss building styles.
• It can be used metaphorically to describe any object or shape that resembles this architectural form, though this is less common.
  • The chef placed a scoop of ice cream in a pastry shell, creating a dessert that looked like a delicious onion dome.

Variants and Related Words

• Dome (n): A rounded vault forming the roof of a building or structure, often a hemisphere. An "onion dome" is a specific type of dome.
• Cupola (n): A small dome, especially one crowning a roof or turret. An onion dome is a type of cupola with a distinct shape.

Synonyms

• Bulbous dome: A dome with a bulging, rounded shape similar to a bulb. This is a more general descriptive term.
• Helmet dome: A type of dome found in Russian architecture that is helmet-shaped rather than bulbous, sometimes mentioned in contrast to the onion dome.

Idioms

There are no common idioms that use the term "onion dome." It is a specific architectural term.

Noun

1. a dome that is shaped like a bulb; characteristic of Russian and Byzantine church architecture