1) We almost never consider a thing like that in our daily life and cannot find a clear definition of it easily. You might be at a loss as to how to find an answer because it is too vague an ambiguous question.
2) There is, however, one thing I can tell for sure: The world of usualness cannot stand independently. This means that it will appear in front of us as a reality filled with a variety of meanings only when we do "live".
