«السنة لغة: الطريقة، وشرعاً: ما واظب عليه الرسول ﷺ أو الخلفاء الراشدون من بعده»
Lexically, sunnah means a way or path; here it means a practice persistently maintained by the Prophet ﷺ or by the rightly guided caliphs after him.
Muwazabah is regular, continuing observance. It is central to this particular legal classification and not equivalent merely to hearing of a single incident.
This is the usage in the present chapter. Hadith studies use “Sunnah” more broadly for sayings, actions and tacit approvals, as the earlier lesson explained.