What is sin?

What is sin? A weight... a debt ...disconnection from the divine. This week Christ is called to judge a woman caught in the very act of adultery? Should she be stoned?  A trap? To be sure. By the end of the chapter, the powers of this world threaten Jesus with stoning. Adultery is an example of sin, but what is sin?
Readings: https://bible.usccb.org/bible/readings/040625-YearC.cfm
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