I don’t know if it is possible, in a detailed manner, to define sin. However, I believe this statement by Jesus goes a long way in accomplishing that:
[20] And he said, "What comes out of a man is what defiles a man.
[21] For from within, out of the heart of man, come evil thoughts, fornication, theft, murder, adultery,
[22] coveting, wickedness, deceit, licentiousness, envy, slander, pride, foolishness.
[23] All these evil things come from within, and they defile a man." Mark 7:20-23 RSV
[21] For from within, out of the heart of man, come evil thoughts, fornication, theft, murder, adultery,
[22] coveting, wickedness, deceit, licentiousness, envy, slander, pride, foolishness.
[23] All these evil things come from within, and they defile a man." Mark 7:20-23 RSV