2. Something might be confined to a particular area or group of people
if it appears only to exist there.
It is now known that the illness is not confined to any one group in
society.
It's
an attitude which seems to be confined to the upper classes.
3. If a person is confined, they are kept, often by force, in an enclosed
place.
He had been confined for so long that he couldn't cope
with the outside world.
This page is cited from Cambridge Dictionaries Online. For the original,
please visit
http://dictionary.cambridge.org/define.asp?key=confine*1+0