castles Get Printable Handwriting Hear It! Say It! Write It! Learn It! Spelling Test Definition plural noun. 1 a large strong building where a noble lived with his family and servants; 2.one of two game pieces in chess Example Sentence Many castles were built long ago to defend the people from attacks. Synonyms fort; refuge; manor; mansion; palace Antonyms cottage Hear It! Say It! Write It! castles Switch to cursive Start Share with your friends: