carstone Get Printable Handwriting Hear It! Say It! Write It! Learn It! Spelling Test Definition noun. a firmly cemented ferruginous sandstone found in the British isles; esp one of Cretaceous age used as a building stone Example Sentence The building was constructed of carstone. Synonyms sandstone; building stone; ferruginous sandstone Antonyms grass Hear It! Say It! Write It! carstone Switch to cursive Start Share with your friends: