rex
noun
king.
rex
1 American
[r eks, reks]
/ rɛks, rɛks /
noun
Latin.
reges
plural
Rex
2
American
[reks]
/ rɛks /
noun
Rex
3
American
[reks]
/ rɛks /
noun
Rex
British
/ rɛks /
noun
Other Word Forms
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.
Using this system, T. rex ranked as the most robust skull in the study.
From Science Daily • May 20, 2026
Close behind was Tyrannotitan, another enormous theropod that lived in what is now Argentina more than 30 million years before T. rex during the Early Cretaceous period.
From Science Daily • May 20, 2026
It lived between 100 and 120 million years ago - around 40 million years earlier than the tyrannosaurus rex - and is about twice the size of that creature.
From BBC • May 14, 2026
A new type of giant long-necked dinosaur, twice the size of a tyrannosaurus rex, has been identified up by scientists from remains dug up in Thailand.
From BBC • May 14, 2026
It was like the scene in Jurassic Park when the children turn and the T. rex is right there.
From "Born a Crime: Stories from a South African Childhood" by Trevor Noah
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.
