noun

1. The action of exposing something to something, such as skin to the sunlight.

2. (authorship) The act or process of declaring or describing something through either speech or writing; the portions and aspects of a piece of writing that exist mainly to describe the setting, characters and other non-plot elements.

   “My reviewer said she couldn't picture the setting for my story, so I'm improving the exposition.”

3. The act of expulsion, or being expelled, from a place.