A forged or spurious work made to appear authentic; a counterfeit or apocryphal item (often of art, documents, etc.).
彼は有名画家の作品を偽作して販売したとして逮捕された。
He was arrested for forging works of a famous painter and selling them.
その古文書は後世の偽作だと専門家に断定された。
Experts concluded that the old document was a later forgery.
学術誌に偽作の論文が掲載されて問題になった。
A forged/spurious paper was published in an academic journal, causing a scandal.