pre-noun adjectival
the usual; that typical
Refers to something that is habitual, expected, or characteristic of a person or situation. Often used when both speaker and listener share an understanding of what is meant.
He's having coffee at that usual café again today.
That person (you know who) came again.
pre-noun adjectival
that (aforementioned); you-know-what
Points to a specific person, thing, or matter previously mentioned or implicitly understood between speaker and listener, often with a conspiratorial or euphemistic tone.
What happened with that matter we talked about?
in the usual way
Archaic adverbial use; in modern Japanese the pre-noun adjectival form is standard.
In old documents it is sometimes used adverbially, as in 例のごとく (as usual).
Let's meet at the usual place.
Has that thing (you know what I mean) been resolved yet?
law of multiple proportions
Compound of 例 (rei, 'example, precedent') + possessive particle の (no). The adverbial sense is an archaic extension.