\ ˈreks \
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 \

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

Photo: christopher jue/epa-efe/rex/Shutterstock Mr. Saikawa helped oversee joint purchasing of parts between Nissan and Renault. Phred Dvorak, WSJ, "At Troubled Nissan, CEO Described as a ‘Space Alien’ Takes the Wheel," 30 Dec. 2018 Names like Draculoides bramstokeri, a cave-dwelling relative of spiders; or the tiny, harmless pseudo-scorpion Tyrannochthonius rex; or Hebejeebie, the name that botanists simply couldn’t resist when a new genus was separated from Hebe. Kevin Thiele, Smithsonian, "Why Scientists Name Species," 28 Apr. 2018 Photo: shawn thew/epa-efe/rex/shutterstock Who are some other prominent figures to watch as Democrats take the House? Joshua Jamerson, WSJ, "Who’s Who in the New Congress," 4 Jan. 2019 Photo: peter powell/epa-efe/rex/shutterstock Mourinho wasn’t even able to count on his team’s typical defensive solidity to scratch out results. Joshua Robinson, WSJ, "Mourinho Fired From Manchester United as Premier League Heavyweights Struggle," 18 Dec. 2018 Photo: perry duffin/epa-efe/rex/shutterstock The tactic worked until winter rains failed to arrive this year, turning fertile areas into dust bowls. Rob Taylor, WSJ, "Drought Tests Australia’s Model Water Market," 8 Nov. 2018 Remains of Triceratops, Tyrannosaurus rex and Pachycephalosaurus have been found on Bliss Dinosaur Ranch in Weston, and guests are invited on two- or three-day digs on the 3,500-acre ranch. Susan B. Barnes, USA TODAY, "Dinosaurs in real-life: Where to find them around the US," 26 June 2018 Researchers at the University of Texas at Austin and the Chinese Academy of Sciences examined more than 330 fossil specimens, including small bird-like dinosaurs, large plant-eating dinosaurs, flying pterosaurs and a Tyrannosaurus rex. Brigit Katz, Smithsonian, "Actually, T. Rex Probably Couldn’t Stick Out Its Tongue," 22 June 2018 Photo: jeon heon-kyun/epa-efe/rex/shutt/EPA/Shutterstock North Korea’s cyber army has about 7,000 hackers and support staffers, according to South Korean cyber experts, who loosely divide them into three teams. Timothy W. Martin, WSJ, "North Korea, While Professing Peace, Escalated Cyberattacks on South," 25 May 2018

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

5 Feb 2019

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Time Traveler for rex

The first known use of rex was in 1920

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Rhyming Dictionary: Words that rhyme with rex

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to deny responsibility for

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