noun
Refers to an artist's or craftsman's greatest work, often used in art, music, or literature contexts.
この絵は彼のマスターワークと言われている。
This painting is said to be his masterwork.
傑作 is a more common native Japanese word for 'masterpiece', while マスターワーク is a direct loanword often used in artistic or critical contexts.
Borrowed from English 'masterwork'.