Pronunciation: (li-thog'ru-fē),[key] —n. 1. the art or process of producing a picture, writing, or the like, on a flat, specially prepared stone, with some greasy or oily substance, and of taking ink impressions from this as in ordinary printing.
2. a similar process in which a substance other than stone, as aluminum or zinc, is used. Cf. offset (def. 6).