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Synonyms

rex

1 American  
[reks, reks] / rɛks, rɛks /

noun

Latin.

plural

reges

  1. king.

Rex 2 American  
[reks] / rɛks /

noun

  1. a Belgian fascist party founded in 1935.

Rex 3 American  
[reks] / rɛks /

noun

  1. a male given name.

Rex British  
/ rɛks /

noun

  1. king: part of the official title of a king, now used chiefly in documents, legal proceedings, inscriptions on coins, etc Compare Regina 1

"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

  • Rexist noun

Etymology

Origin of Rex

After Christus Rex, title of a publication put out by its founders

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.

If anything, after a few days spent dipping my T. rex hands into the cool primordial sludge of the dinosaur fandom, Panella’s sentiment feels like an understatement.

From Salon • Apr. 12, 2026

A tridimensional T. rex protrudes from Iñaki Godoy’s head while he holds a small plush toy of Monkey D. Luffy, the character who changed his life forever.

From Los Angeles Times • Mar. 10, 2026

More than a century after Tyrannosaurus rex was first discovered, the species continues to surprise scientists.

From Science Daily • Mar. 5, 2026

Scientists believe it rivalled the fearsome Tyrannosaurus rex in size, measuring around 40 feet long with a 20-inch sword-like crest on its head.

From Barron's • Feb. 27, 2026

Kind of like a Tyrannosaurus rex combined with an airplane, if an airplane flapped its wings really hard.

From "Unusual Chickens for the Exceptional Poultry Farmer" by Kelly Jones

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.