It’s January and everyone seems to be turning over a new leaf. Here a leaf is like a page in a book, not a leaf like something that falls from the trees in the autumn. This is an empty page, a chance to start over, to begin anew. When we turn over a new leaf we try to do better, to be better than we were before.
Likewise, we can use leaf as a verb when talking about turning pages: to leaf through a book.
He leafed through the book quickly, trying to find the answer.
When you leaf through something, you turn the pages quickly, looking briefly at each page or even every couple of pages. You don’t read every page. You generally leaf through a book in the bookshop when deciding whether or not to buy it.
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