This verb means to seal something securely, making it tamper-proof or secret. Revelation 5:1 describes the scroll 'sealed with seven seals' in the right hand of the one on the throne. The perfect passive participle emphasizes the completed state—it stands sealed, secured against opening. Classical usage shows sealing documents, making things fast, or securing property. The multilingual witnesses preserve the sealing imagery. In ancient practice, multiple seals indicated maximum security and authenticity. John's vision presents a scroll whose contents remain inaccessible until the Lamb proves worthy to break the seals.