jack-rabbit Get Printable Handwriting Hear It! Say It! Write It! Learn It! Spelling Test Definition noun. a large, fast-moving hare found in North America. Example Sentence The jack-rabbit quickly darted across the desert landscape. Synonyms hare; lepus; cottontail Antonyms tortoise; snail Hear It! Say It! Write It! jack-rabbit Switch to cursive Start Share with your friends: