The centerfold or centrefold of a magazine is the inner pages of the middle sheet, usually containing a portrait, such as a pin-up or a nude. The term can also refer to the model featured in the portrait. In saddle-stitched magazines (as opposed to those that are perfect-bound), the centerfold does not have any blank space cutting through the image.
The term was coined by Hugh Hefner, founder of Playboy magazine. The success of the 1953 first issue of Playboy has been attributed in large part to its centerfold: a nude of Marilyn Monroe. The advent of monthly centerfolds gave the pin-up a new respectability and helped to sanitize the notion of "sexiness". Being featured as a centerfold could lead to film roles for models, and still occasionally does today.
