Academic Study: The Meaning and Historical Development of the Root "Khatm" (ختم) from Pre-Islamic Arabia to the Era of al-Bukhārī and Muslim, and the Consensus of the Ummah

The Arabic root Khatm (خ-ت-م) is among the most significant roots in classical Arabic, because it carries two core meanings that were already established in the pre-Islamic period: 1. Sealing, stamping, and closing (a physical act), such as sealing letters, contracts, containers, or documents. 2. Ending, completion, and finality (a conceptual meaning), i.e., reaching the last stage of something such that nothing of the same category follows. With the advent of Islam, the Qur’an and the Prophetic Sunnah employed this root with major theological implications—most importantly in the doctrine of the finality of prophethood, meaning that Prophet Muḥammad ﷺ is the last prophet, and therefore prophethood has ended permanently after him. This study provides a historical and linguistic analysis of the root Khatm from the pre-Islamic era through the Qur’anic usage and the Prophetic Sunnah, then explains how the early Muslim community (the Companions and the Successors) understood and applied it, up to the era of the great ḥadīth authorities such as al-Bukhārī and Muslim. It also presents the positions of the major Islamic schools and groups, demonstrating that the finality of prophethood is a universal principle across the Ummah, grounded in the authentic sources of Islam.