Refers to an outstanding work of art, literature, or craft; a classic or crowning achievement.
This novel is his greatest masterpiece.
That movie can truly be called a masterpiece.
hilarious (unintentionally); absurd; outrageous
Jocular, dated usage: describes a blunder, remark, or situation so bad or absurd that it becomes funny. Often used with な, as in 傑作な話.
His story of failure was unintentionally hilarious.
That slip of the tongue is absurdly funny, isn't it?
The painter produced a masterpiece late in his life.
The story of him getting on the wrong train was hilariously absurd.
This novel is praised as the masterpiece of the century.
That excuse is a real riot.
傑作 highlights outstanding artistic quality regardless of the creator's career, while 代表作 specifically names the work that best represents an artist's overall output.
傑作 covers a masterpiece in any artistic field (novels, music, art, etc.), while 名画 is limited to a famous painting or a classic film.
傑作 is the standard word for a masterpiece in art or literature, whereas 絶品 is used more broadly, especially for food and crafted goods.
傑作 is a general word for an outstanding creative work in any field, whereas 名曲 narrows that praise to music.
名著 emphasizes a book's lasting intellectual or literary importance, whereas 傑作 simply praises any work (book, art, film) as exceptionally well-made.
傑作 highlights outstanding artistic quality, while 超大作 highlights grand scale and blockbuster status regardless of critical merit.
傑作 praises a work for its artistic excellence, whereas ヒット作 focuses on its commercial success regardless of critical quality.