masterpiece; magnum opus; crowning work
Refers to the best work produced by an artist, writer, or creator; often used in reviews and critiques.
This film is said to be the director's masterpiece.
Her magnum opus may not have been created yet.
傑作 means a masterpiece or excellent work, while 最高傑作 emphasizes it is the very best among all works.
Compound of 最高 (highest) and 傑作 (masterpiece).