cognitive content, mental object, content - the sum or range of what has been perceived, discovered, or learned

practice - knowledge of how something is usually done; "it is not the local practice to wear shorts to dinner"

habit, wont - an established custom; "it was their habit to dine at 7 every evening"

Hadith - (Islam) a tradition based on reports of the sayings and activities of Muhammad and his companions

institution - a custom that for a long time has been an important feature of some group or society; "the institution of marriage"; "the institution of slavery"; "he had become an institution in the theater"