noun. A photographic device for making positive or negative copies of graphic matter.

noun. A copy made with such a device.

noun. A photocopy, especially one made by a Photostat machine

noun. positive (black on white) or negative (white on black) reproduction of printed matter or artwork made on a photostat machine, which uses photographic paper instead of a transparent negative, and uses a prism to render the paper negative readable instead of reversed.

verb. To make such a photocopy.