exposition
Pronunciation: /ɛkspəˈzɪʃ(ə)n/
noun
- 1a comprehensive description and explanation of an idea or theory: a systematic exposition of the idea of biodiversity
- 2a large public exhibition of art or trade goods: the exposition will feature exhibits by 165 companies

Origin:
Middle English: from Latin expositio(n-), from the verb exponere 'expose, publish, explain'