exposition in WordNet English dictionary

1. a collection of things (goods or works of art etc.) for public display
   exhibition  exposition  expo 
   
2. a systematic interpretation or explanation (usually written) of a specific topic
   exposition  expounding 
   
3. an account that sets forth the meaning or intent of a writing or discourse
   "we would have understood the play better if there had been some initial exposition of the background"
   exposition 
   
4. (music) the section of a movement (especially in sonata form) where the major musical themes first occur
   exposition