unreleased
adj. B2 Upper Intermediate US //ənɹɪˈɫist// UK //ˌʌnɹɪlˈiːsd// un·re·leased
adj. not yet made available for the public to see, hear, or buy. You often hear this about music or movies that are finished but kept secret.
adj. not yet made available for public distribution, sale, or exhibition. Often describes creative works like music, films, or software that remain in a private archive.
The band has many unreleased songs from their first album.
Fans were excited to hear an unreleased demo that the singer shared on social media last night.
The documentary features rare footage and unreleased interviews that provide a new perspective on the artist's final years before they retired from public life.
Usage
Typically used attributively before a noun; often follows a linking verb like 'remain'.