\ ˈreks How to pronounce rex (audio) \
plural rexes or rex

Definition of rex

 (Entry 1 of 2)

: an animal (such as a domestic rabbit or cat) showing a genetic recessive variation in which the guard hairs are very short, sparse, or entirely lacking — compare cornish rex, devon rex
\ ˈreks How to pronounce rex (audio) \

Definition of rex (Entry 2 of 2)

: king

Illustration of rex

Illustration of rex


In the meaning defined above

Examples of rex in a Sentence

Recent Examples on the Web: Noun

But the Tyrannosaurus rex was struck down in her prime, before reaching her 30s, by an unlikely culprit. Ashley Strickland, CNN, "Meet Victoria, one of the most complete T. rex fossils in the world," 12 Sep. 2019 The ride presents the specter of millions of tourists meeting the franchise's most fearsome dinosaurs – from the Mosasaurus, the genetic creation Indominus rex, and naturally T. rex. Erin Jensen, USA TODAY, "Bryce Dallas Howard: My dad Ron Howard 'legit' thought Jessica Chastain was me," 24 July 2019 In an earlier article, Earther's Brian Kahn explains that the heat wave was caused by a weather phenomenon called a rex block. Jason Daley, Smithsonian, "French Village Hits 114.6 Degrees, Setting New National Record," 1 July 2019 Next door is the Burpee Natural History Museum, which has four stories of exhibits on ancient life, including a T-rex named Jane and a teenage triceratops named Homer. Kristi Valentini, Woman's Day, "These Summer Vacation Spots Are the Hidden Gems of the Midwest," 25 June 2019 Modern birds descended from a group of two-legged dinosaurs known as theropods, whose members include the towering Tyrannosaurus rex and the smaller velociraptors. Quanta Magazine, "How Dinosaurs Shrank and Became Birds," 2 June 2015 Nebraska Omaha: The Tyrannosaurus rex is enshrined in pop culture and, well, natural history as one of the most fearsome beasts to ever walk the earth. USA TODAY, "Fairy houses, feuding cousins, a fish app: News from around our 50 states," 3 June 2019 Photo: david hecker/epa-efe/rex/Shutterstock The president has focused his main firepower on China, imposing tariffs on $250 billion of Chinese exports. Emre Peker, WSJ, "EU’s High Trade Surplus With the U.S. Poses Risk to 2018 Tariff Truce," 1 Jan. 2019 The tyrannosauroid, named Suskityrannus hazelae, stood roughly 3 feet tall at the hip and was about 9 feet in length—only slightly longer than the skull of its full-grown cousin, the famed Tyrannosaurus rex. David Grossman, Popular Mechanics, "New Tiny T-Rex Cousin Discovered," 6 May 2019

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'rex.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of rex


1920, in the meaning defined above

History and Etymology for rex


modification of French castorrex, castorex, a variety of rabbit, perhaps from Latin castor beaver + rex king — more at castor, royal

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Last Updated

17 Sep 2019

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Time Traveler for rex

The first known use of rex was in 1920

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