\ 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


Latin noun
\ 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 Interspersed amid this whimsical woodland are several large-scale dinosaur statues, including a Tyrannosaurus rex and a triceratops. Nevin Martell, Washington Post, 28 July 2022 Meraxes had short arms and a huge skull, similar to the Tyrannosaurus rex. Wyatte Grantham-philips, USA TODAY, 8 July 2022 The Gorgosaurus walked the earth roughly 77 million years ago, about 10 million years before its more famous relative, the Tyrannosaurus rex. Bryan Hood, Robb Report, 6 July 2022 As the largest Triceratops specimen ever discovered (the skull alone measures more than five feet long), Big John was sold to an anonymous bidder last October for $7.7 million — the highest price ever for a non-Tyrannosaurus rex fossil. New York Times, 7 Apr. 2022 Sixty-six million years ago, one of the most famous creatures in history roamed Earth: the Tyrannosaurus rex. Steve Donoghue, The Christian Science Monitor, 23 June 2022 In Dominion, which opened last weekend to No.1, a Therizinosaurus and a Tyrannosaurus rex team up to kill the ultimate bad dino, a Giganotosaurus. Ryan Parker, The Hollywood Reporter, 18 June 2022 If Spielberg could bring a Tyrannosaurus rex back from extinction… what else was possible? Rebecca Rubin, Variety, 9 June 2022 That list includes a Tyrannosaurus rex swimming with its young frantically paddling to keep up, or the competition among male Barbaridactylus pterosaurs to win a mate. Brian Lowry, CNN, 23 May 2022 See More

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.

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

Learn More About rex

Dictionary Entries Near rex

rewrite rule


rex begonia

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Statistics for rex

Last Updated

8 Aug 2022

Cite this Entry

“Rex.” Dictionary, Merriam-Webster, Accessed 14 Aug. 2022.

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