exposition

noun

1. a systematic interpretation or explanation (usually written) of a specific topic

   noun.communication

   Synonyms expounding

   Source: WordNet 3.0

2. a collection of things (goods or works of art etc.) for public display

   noun.group

   Synonyms exhibition expo

   Source: WordNet 3.0

3. an account that sets forth the meaning or intent of a writing or discourse

   noun.communication

   Examples

   We would have understood the play better if there had been some initial exposition of the background.

   Source: WordNet 3.0

4. (music) the section of a movement (especially in sonata form) where the major musical themes first occur

   noun.communication

   Source: WordNet 3.0

5. The act of exposing or laying open; a setting out or displaying to public view.

   noun

   Source: webster1913