Megalosaurus Get Printable Handwriting Hear It! Say It! Write It! Learn It! Spelling Test Definition noun. a large carnivorous dinosaur that lived during the Jurassic period. Example Sentence The Megalosaurus weighed about one ton and was 30 feet long. More Example Sentences Many fossils of megalosaurus were discovered. Synonyms dinosaur; reptile; predator Antonyms herbivore Hear It! Say It! Write It! Megalosaurus Switch to cursive Start Share with your friends: