the copies of a book or other printed material which originate from the same press run or from the same plates or setting of type at one time. In the example given for "Edition", the 500 copies would be the first printing and the 300 copies comprise the second printing. In the 19th century some publishers labeled later printings as if they were later editions, i.e. a second printing would be called a "second edition" on the copyright page. (see also edition).