IPA: /ˌɛkspəˈzɪʃən/
KK: /ɛkˈspəʊzɪʃən/
A public display or presentation of art, ideas, or information, often to inform or educate people.
The art exposition featured works from local artists and attracted many visitors.
Exposition is formed from "ex-" (meaning out) and "ponere" (meaning to place). The word refers to placing something out for others to see, often used in the context of a public display or presentation.
Think of 'placing something out' ('ex-' means out and 'ponere' means to place') — that's why exposition refers to a public display or presentation.