1. An original creation by an artist, author, or creator that is genuine and not a copy, forgery, or imitation
The museum displayed only authentic works by Picasso, verified by experts.
O museu exibiu apenas obras autênticas de Picasso, verificadas por especialistas.
2. A work that reflects the true style, intent, and originality of its creator without alterations or falsifications
Scholars debated whether the newly discovered manuscript was an authentic work of Shakespeare.
Estudiosos debateram se o manuscrito recém-descoberto era uma obra autêntica de Shakespeare.