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rotunda

American  
[roh-tuhn-duh] / roʊˈtʌn də /

noun

rotundas plural
  1. a round building, especially one with a dome.

  2. a large and high circular hall or room in a building, especially one surmounted by a dome.


rotunda British  
/ rəʊˈtʌndə /

noun

  1. a building or room having a circular plan, esp one that has a dome

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Other Word Forms

Noun Inflected Forms

Etymology

Origin of rotunda

1680–90; alteration of Italian rotonda, noun use of feminine of rotondo < Latin rotundus rotund

Explanation

When making the plans for your new house, consider adding a rotunda, or a round room. It will give the house a grand appearance and also allow you to walk in circles as much as you please. You may have heard the adjective rotund to describe a person with a round shape. Rotunda, with an -a at the end, is a noun that refers to a type of building or room that is round and often has a dome on top. Rotundas are often found as part of large, important buildings such as capitol buildings and museums.

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Vocabulary lists containing rotunda

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

He turns and gives her a smile after delivering that line inside the Capitol rotunda.

From The Wall Street Journal • Jan. 31, 2026

And it incinerated his white-and-green stable with its stately central rotunda.

From Los Angeles Times • May 4, 2025

Built in 1939 as the Floral Hall, the Ocean Room is a distinctive rotunda building, and for the past 50 years has operated as a night club and function venue.

From BBC • Apr. 26, 2025

Everywhere the camera pointed inside the rotunda, a new “most fugly jacket I’ve ever seen” appeared.

From Salon • Jan. 21, 2025

Exiting the rotunda, the librarian entered the Children’s Room.

From "Escape from Mr. Lemoncello's Library" by Chris Grabenstein

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