/ ˈɪnəsns; NAmE / noun [ U ]
1.
the fact of not being guilty of a crime, etc. :
She protested her innocence (= said repeatedly that she was innocent) .
This new evidence will prove their innocence.
I asked if she was married in all innocence (= without knowing it was likely to offend or upset her) .
OPP guilt
2.
lack of knowledge and experience of the world, especially of evil or unpleasant things :
Children lose their innocence as they grow older.
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WORD ORIGIN
Middle English : from Old French , from Latin innocentia , from innocent- not harming (based on nocere injure).