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  • rex
    rex
    noun
    king.
  • Rex
    Rex
    noun
    a Belgian fascist party founded in 1935.
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.

Estimates suggest Nanotyrannus reached about 18 feet in length, making it significantly smaller than a full-grown T. rex, which could exceed 40 feet.

From Science Daily • Apr. 15, 2026

"At the time, the prevailing consensus was that the Nanotyrannus holotype skull represented an immature Tyrannosaurus rex, and was not a separate species," said Griffin, assistant professor of geosciences at Princeton.

From Science Daily • Apr. 15, 2026

"This small-bodied -- in relation to the T. rex -- meat-eater's hyoid bone showed growth patterns that suggest maturity or approaching maturity," said Poust, Voorhies Endowed Curator of Vertebrate Paleontology.

From Science Daily • Apr. 15, 2026

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

From the way his pockets were sticking out it looked like he had one Tyrannosaurus rex and one triceratops.

From "The Watsons Go to Birmingham" by Christopher Paul Curtis

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.