rad Get Printable Handwriting (rad) 1 syllables Hear It! Say It! Write It! Learn It! Spelling Test Definition adjective. very cool or awesome; excellent. Example Sentence The rad is a unit of energy. More Example Sentences Her skateboard tricks are super rad. Synonyms cool; awesome; fantastic Antonyms bad; dull; boring Hear It! Say It! Write It! rad Switch to cursive Start Share with your friends: