Idiom meaning, usage examples, facts
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OPEN BOOK
a person who doesn’t hide anything about himself or herself; a person’s life or mind in which nothing is hidden
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1. Cindy hides nothing about how she spends her time. Her life is an open book.
2. James and John are as different as night and day. James is an open book, but John is very secretive. The expression suggests that a person who is an open book is easy to “read” or understand. |
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