LEAF

(PAPER) [noun] [C] [plural] leaves - a thin flat object or layer of somethingA leaf of paper fell out of the book.She turned the leaves of the book (= pages) slowly.We had to put in/pull out the extra leaf of the table (= extra part of the table that can be folded away when not wanted) because there were eight of us for dinner.If you take a leaf from/out of someone's book you copy the way they behave because they are a good example to follow.You'd do well to take a leaf out of John's book.