exposition
ex·po·si·tion
noun
1.
a systematic interpretation or explanation (usually written) of a specific topic
Origin
From 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.
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WordNet 2.1 (Princeton University). Wiktionary (CC BY-SA). CMU Pronouncing Dictionary. WordNet 2.1 Copyright Princeton University. All rights reserved. Wiktionary content is available under the Creative Commons Attribution-ShareAlike Licence.