ballpen Get Printable Handwriting Hear It! Say It! Write It! Learn It! Spelling Test Definition noun. a writing instrument that uses a tiny ball to dispense ink. Example Sentence I use a ballpen to write my notes. More Example Sentences The ballpen worked better than a pencil. Synonyms pen; writing tool; biro Antonyms pencil; marker Hear It! Say It! Write It! ballpen Switch to cursive Start Share with your friends: