זִיּוּף, (זוּף, Pi.) informality, fault. Y. Gitt. II, 44ᵃ bot. זה זִיּוּפוֹ מד"א such a document (written in day-time and signed by night) would be defective on account of a condition not perceptible from the document itself, opp. מזוייף מתוכו, v. זוּף I.