Meaning

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

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

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

originFrom Middle English exposicioun, from Old French esposicion, from Latin expositiō, from expōnere (“to put forth”). The sense meaning "exhibition" is a later semantic loan from French exposition.

Etymology from Wiktionary, CC BY-SA 3.0