compact disk Get Printable Handwriting Hear It! Say It! Write It! Learn It! Spelling Test Definition noun. a digitally encoded recording on an optical disk that is smaller than a phonograph record; played back by a laser Example Sentence Jessica downloaded the photos on to a compact disk. Spelled with a K. Synonyms CD; digital recording; disk Antonyms record player Hear It! Say It! Write It! compact disk Switch to cursive Start Share with your friends: