Exhibitionism is behaviour by which a(e) individual(e) exposes the intimate parts of her body to one or more other persons in a situation - for example a public place - where these intimate parts are normally or usually not exposed.
There is exhibition so that there is the world around and be done in a place open to everyone.
To be naked at the window of his room while there's not facing less than 100 m is not an exhibition !
Some people speak of exhibition on the web, as for example the "cam shows.. The principle remains the same except that this is often done at home and that is showing off to people who are voluntarily come see the show, What is that for purists of the exhibition, webcams are not part.
The flashing is a very fast exhibition with the world around. An example of flashing is quickly showing her tits (2 to 3 seconds).
