The verb chatam means to seal with a signet ring, to mark with an official seal of ownership or authorization, or to close something definitively. The seal (chatam) made a document legally binding or a space inviolable.
Sealing in Scripture carries divine authority. God seals up iniquity for future reckoning (Job 14:17) and seals prophetic visions for appointed times (Daniel 12:4, 9). The royal signet ring represents delegated authority (Genesis 41:42; Esther 8:8). Most profoundly, Daniel 9:24 prophesies that the Messiah will 'seal up vision and prophecy' — bring all prophetic promise to its final fulfillment. In Revelation, the Lamb alone can break the seven seals (Revelation 5:5), and believers are sealed with the Spirit (Ephesians 1:13) as God's own. Chatam thus encompasses authentication, finality, and divine ownership.