Al-maqṭūʿ (literally, severed) consists of the sayings and actions of the tābiʿūn and those after them.1
Muqaddimat Ibn al-Ṣalāḥ, pp. 42 to 44. Taqrīr (tacit approval) falls under the first, sayings, because it counts as a statement in juristic terms, or under the second, actions, because the act of remaining silent is itself an action, as Shaykh Muḥammad Salmān al-Sahāranpūrī cites in Taqrīr al-Mishkāt (p. 3) on the authority of al-Awjaz. Note, however, that the tacit approval of someone other than the Prophet ﷺ is not necessarily attributed to him unless it is free of any cause that would prevent objection, in contrast to the Prophet's own tacit approval. See: Nukat Ibn Ḥajar, p. 181. ↩
The definition of al-mawqūf in al-Mulakhkhaṣ: al-mawqūf (literally, halted) consists of the sayings and actions of the Companions (raḍ. ʿanhum).
Al-mursal is an omission from the end of the isnād, after the tābiʿī; one of the four kinds of rejected report rooted in a break in the chain.
How the muḥaddithūn, fuqahāʾ and uṣūliyyūn differ in their working definitions of ḥadīth, and why those differences track back to their respective objectives.
If the narrators of a ḥadīth agree in their wording of transmission, in any verbal feature, in an action or in some shared quality, this is al-musalsal (a chained or serial ḥadīth).
