tyrannosaurus rex Get Printable Handwriting Hear It! Say It! Write It! Learn It! Spelling Test Definition noun. a large carnivorous dinosaur with a massive head and small arms. Example Sentence The tyrannosaurus rex walked on two legs. More Example Sentences Tyrannosaurus rex was a fierce predator. Synonyms T. rex; dinosaur; giant lizard Hear It! Say It! Write It! tyrannosaurus rex Switch to cursive Start Share with your friends: