Learner's definition of INNOCENCE
the state of being innocent: such as
the state of being not guilty of a crime or other wrong act
lack of experience with the world and with the bad things that happen in life
lack of knowledge about something
Your innocence [=(more commonly) ignorance] of the rules is no excuse for such behavior.
I mentioned in all innocence what turned out to be a very painful topic for her. [=I mentioned the topic without knowing that it was so painful for her to talk about it]