On executing command
ct lsview | grep -i <some_string>
The result is a list of views.
Few of them are something like
* <view_name1>
What does this star (*) mean?
It means they are dynamic views (MVFS Multi Version filesystem) which are started.
When you start a view, it becomes visible in /view (unix) or M:\ (Windows), the MVFS mounting point.
See "What is the nature of a “MVFS filesystem” with ClearCase?"
This would not apply to snapshot views, as they are always available directly in your local disk: see "What are the differences between a snapshot view and a dynamic view?"