"exposion" is probably misspelled. Trying exposition instead Definition of exposition
1
[ noun ] an interpretation of the meaning of something; the act of construing
2
[ noun ] a systematic interpretation or explanation (usually written) of a specific topic

Synonyms

expounding

3
[ noun ] an account that sets forth the meaning or intent of a writing or discourse

Examples

"we would have understood the play better if there had been some initial exposition of the background"

4
[ noun ] a collection of things (goods or works of art etc.) for public display

Synonyms

exhibition expo

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