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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Top Definition
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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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

The Urban Dictionary Mug

Lotsa space for your liquids.

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The Urban Dictionary Mug

Lotsa space for your liquids.

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The Urban Dictionary Mug

Your favorite word on a white mug.

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The Urban Dictionary Mug

One side has the word, one side has the definition. Microwave and dishwasher safe. Lotsa space for your liquids.

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The Urban Dictionary T-Shirt

Soft and offensive. Just like you.

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The Urban Dictionary T-Shirt

Smooth, soft, slim fit American Apparel shirt. Custom printed. 100% fine jersey cotton, except for heather grey (90% cotton).

Buy the t-shirt