rockhopper Get Printable Handwriting Hear It! Say It! Write It! Learn It! Spelling Test Definition noun. a type of small penguin known for its distinctive yellow crests and hopping movements. Example Sentence The rockhopper slid into the water. Spelled as one word. More Example Sentences They saw a rockhopper at the zoo. Synonyms penguin; bird; jumper Antonyms hill Hear It! Say It! Write It! rockhopper Switch to cursive Start Share with your friends: