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Someone who doesn't say much about themselves, no one really knows anything about their past, hobbies, or likes/dislikes.
A closed book is sometimes mistakenly defined as someone with "trust issues".
Person 1: How much do you know about her?
Person 2: Not much. She's a closed book, so she doesn't share much about her.
by Cynedia August 08, 2016
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a guy/girl who doesn't let anyone read them or cant let anyone read them. possibly thought their ex was 'the one' and went over a bad breakup and left thinking they were the best they ever had.
Mike: Dude I dig her but she's a closed book.
Joe: Forget about it man her loss, there's other fish in the sea.
by johnnyplaylax June 29, 2010
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Any woman/girl who acts in a way that makes her difficult to figure out or understand.
I really like this chick, but she's like a closed book to me.
by SlangTwang January 18, 2009
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