dirt bikes Get Printable Handwriting Hear It! Say It! Write It! Learn It! Spelling Test Definition noun. a small motorcycle designed and built with special tires and suspension for riding on unpaved roads and over rough terrain Example Sentence Roy rode dirt bikes with Sam. Spelled as two words. Synonyms trail bike; scrambler; lightweight motorcycle Antonyms airplane Hear It! Say It! Write It! dirt bikes Switch to cursive Start Share with your friends: