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rotunda

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

noun

  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

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.

While robots in the rotunda were programmed to dance, other robots at the event were teleoperated by engineers who wore body suits and virtual-reality headsets.

From The Wall Street Journal • Jan. 3, 2026

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

The Bidens traveled to a private home in Santa Ynez after attending the inauguration of President Trump in the packed rotunda of the U.S.

From Los Angeles Times • Jan. 22, 2025

It was the coldest inauguration day in 45 years, meaning that the planned outdoor ceremony had to be scrapped and moved inside of the Capitol’s rotunda, which holds considerably fewer people.

From Salon • Jan. 21, 2025

They walked along the outer edge of the rotunda, passing the archways where scythes wheeled and dealed.

From "Scythe" by Neal Shusterman