exposition

英 [ekspə'zɪʃ(ə)n] 美[,ɛkspə'zɪʃən]

• n. 博览会；阐述；展览会

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

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

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"